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Machicolation

A machicolation is a defensive architectural element in medieval fortifications, consisting of a projecting gallery or parapet supported by corbels with openings in the floor through which boiling oil, molten lead, stones, or other missiles could be dropped on attackers below. Also known as a "murder hole," it allowed defenders to target assailants at the base of walls or gates while providing a vantage for observation and counterattacks. The feature originated in ancient Egypt around 3000 BCE but saw significant revival and refinement in the Islamic world during the Umayyad period (8th century CE), with early stone examples appearing in structures across Iraq, Spain, and Syria by the 8th to 12th centuries. European adoption occurred primarily through Crusaders in the 12th century, as seen in advanced forms like slot and box machicolations at Syrian sites such as Crac des Chevaliers, where they protected wall bases and integrated with arrow slits for enhanced defense. These designs influenced Western castles, evolving from temporary wooden hoardings—used initially to douse fires set by besiegers—into permanent stone galleries by the late 12th and 13th centuries, often positioned over doorways, towers, and corners to exploit structural vulnerabilities. Prominent examples include the gallery machicolations at Crac des Chevaliers (late 12th century) and in (1197–1198 CE), which demonstrated the feature's role in concentric castle layouts and its adaptation from Eastern models. By the late medieval period, machicolations transitioned from purely functional defenses to decorative motifs in , appearing in non-military buildings as ornamental projections.

Definition and Features

Architectural Description

Machicolations are overhanging architectural features in fortifications, consisting of a projecting or supported by or arches, with deliberate openings in the to facilitate defensive actions. These structures typically form part of the atop walls or towers, extending outward to cover the base of the structure below. The , often triangular or bracket-shaped projections, are arranged in series to bear of the overhanging section, creating a stable cantilevered that integrates seamlessly with the surrounding . Several types of machicolations exist, distinguished by their form and enclosure. The open type features simple overhanging slots formed by corbelled stones, leaving the space beneath exposed for direct vertical access. In contrast, the boxed type comprises an enclosed gallery or , providing defenders with greater while maintaining floor openings; these are often supported on multiple corbels and may include side walls or arrowslits for lateral . Semicircular variants curve outward in a rounded , enhancing coverage over corners or through their arched profile. Additionally, slot machicoulis represent narrower, linear openings integrated directly into walls, while bretèches form localized overhanging turrets. Murder holes, distinct from machicolations, are vertical openings typically in ceilings rather than projecting structures. Construction materials for machicolations were predominantly stone, such as or , for durability in permanent installations, though was used in regions with abundant clay resources, and timber occasionally for temporary or lighter elements like wooden hoardings, which served as precursors. Corbels were precisely cut and placed at regular intervals, with the overhanging platform extending beyond the wall face to optimize projection without compromising structural integrity. Floor openings were narrow and elongated to span multiple corbels, ensuring efficient passage of projectiles while limiting upward visibility for attackers. In design, machicolations integrated closely with battlements, often positioned between merlons to align with crenels, and served as a stone evolution of earlier wooden hoardings. They were embedded within the wall's thickness or added as projections on towers and gatehouses, enhancing overall defensive layering without altering the primary wall structure. This configuration allowed for the dropping of projectiles through the openings, providing vertical enfilade fire.

Defensive Functions

Machicolations served as a critical component of medieval fortifications, primarily enabling defenders to assail attackers positioned at the base of walls or gates without exposing themselves to return fire. This was achieved by allowing the vertical projection of projectiles such as stones, substances like or , or even arrows through the overhanging openings, directly targeting assailants attempting to undermine structures or entrances. In addition to their offensive capabilities, machicolations facilitated secondary roles in and coordination during sieges. Defenders could observe enemy movements below the walls, identifying sappers or parties, while the apertures also supported communication between upper levels of the fortress and ground forces, aiding in the of tactical instructions. These features often integrated with adjacent defensive elements, such as arrow slits for horizontal enfilade fire or murder holes—similar vertical openings in ceilings—for layered protection within gatehouses and passages. The tactical advantages of machicolations were particularly pronounced in addressing vulnerabilities inherent to vertical fortifications, such as dead angles at the wall bases where traditional parapets offered no coverage. By projecting outward, they enabled enfilade-style attacks on clustered attackers, effectively covering approaches to and towers while minimizing defender casualties. This enhanced overall resistance, especially in gatehouses where concentrated assaults were common, turning potential weak points into fortified kill zones. Despite these benefits, machicolations had notable limitations that could compromise their effectiveness in prolonged engagements. They were susceptible to damage from siege engines, such as trebuchets or , which could the protruding corbels and disrupt the structure. Furthermore, in scenarios involving operations, attackers could counter by tunneling beneath the walls, rendering overhead drops ineffective if the machicolations did not align with the undermined sections. Their construction also demanded significant resources, restricting deployment to key defensive nodes rather than comprehensive wall coverage.

Historical Development

Origins in Medieval Europe

Machicolations first appeared in European fortifications during the 12th century within castles in the , where they were incorporated into the defensive architecture of structures built by military orders such as the Knights Hospitaller. These features, consisting of overhanging stone galleries or slots that allowed defenders to drop projectiles or boiling substances on attackers below, were particularly evident in northern Syrian fortresses like , which underwent significant expansion starting in 1142. The design likely drew influences from pre-existing Byzantine and Islamic architectural traditions, where similar overhanging elements had been used in fortifications since the Umayyad period (8th–12th centuries) to enhance base-of-wall defenses against sappers and escaladers. The adoption of machicolations by Crusaders reflected adaptations of Eastern defensive techniques encountered during the ongoing conflicts of the , a period marked by intensified warfare as both Christian and Muslim forces employed advanced engines like trebuchets and operations. This innovation addressed vulnerabilities at the foot of walls, providing a more permanent and effective alternative to temporary wooden hoardings used in earlier castles. Returning Crusaders introduced machicolations to around 1190–1200, with one of the earliest documented examples appearing in at , constructed between 1196 and 1198 under King , who had direct experience from the Third Crusade. This castle featured slot machicolations akin to those at , marking a shift from predominantly wooden defenses to stone-integrated systems in response to the escalating threats of cross-Channel conflicts and royal ambitions. In , initial adoption followed suit in the early , as seen in fortifications influenced by Richard's campaigns, though stone machicolations remained rare until later refinements. The spread was driven by the practical lessons of sieges, where such features proved vital for repelling assaults without exposing defenders.

Evolution and Peak Usage

The transition to permanent stone machicolations in the marked a significant advancement in design, replacing earlier temporary wooden hoardings that had been vulnerable to and damage. These stone structures, corbelled out from walls and featuring floor openings for dropping projectiles or boiling substances, were integrated directly into the of towers and gatehouses, enhancing durability and defensive efficiency. In , this shift accelerated after the civil unrest of the early , with royal initiatives promoting more robust stone fortifications in response to baronial conflicts. Machicolations reached their peak integration during the 14th century within Gothic-style concentric fortifications, where they complemented layered defenses such as inner and outer walls to create kill zones for attackers. This era saw their widespread use in sophisticated designs, exemplified by King Edward I's Welsh castles built in the late 13th and early 14th centuries, which represented the zenith of medieval military architecture through innovative combinations of machicolations with arrow slits and battlements. These features allowed for overlapping fields of fire and close-range assaults, optimizing defense against infantry assaults in an age of prolonged sieges. By the , the advent of began rendering machicolations obsolete, as the protruding stone galleries proved fragile against the horizontal battering forces of cannons and bombards, which could shatter corbels and expose walls. The fall of in demonstrated the vulnerability of traditional high-walled defenses, prompting a shift toward low, sloped bastions and earthworks in early fortifications, though isolated uses persisted in transitional forts until the widespread adoption of trace italienne designs. Machicolations were increasingly combined with barbicans—fortified outer enclosures—and posterns—secondary sally ports—to extend defensive coverage over approach routes, forming integrated gateway complexes that funneled enemies into trapped positions.

Regional and Cultural Variations

Prevalence in Western Europe

Machicolations became a dominant defensive feature in French medieval architecture during the 12th and 13th centuries, particularly in royal and seigneurial castles where they were integrated extensively along walls and gatehouses for enhanced protection against sieges. Elaborate examples appear in the chateaus, such as the Château de Sully-sur-Loire, where machicolations crown the walls, allowing defenders to target attackers below while maintaining structural integrity. In , adoption was more limited and later, often confined to gateways during 13th-century updates to existing fortresses, as seen in built by Edward I, reflecting a cautious integration influenced by French designs but adapted to insular warfare needs. Variations emerged in the , where machicolations in German castles like Marksburg featured more angular, protruding forms to suit rugged terrain and frequent border conflicts, emphasizing verticality over extensive horizontal coverage. On the , machicolations were prominently incorporated into fortifications during the , as in the walls of and the castle at Granadilla, blending Christian defensive innovations with Islamic influences to counter prolonged sieges by Muslim forces. These regional differences highlight how local building materials and strategic priorities shaped the feature's form, with stone corbels in and contrasting the hybrid brick-and-stone constructions in Iberia. Royal patronage significantly drove adoption rates, exemplified by Philip II of France's standardization of castle fortifications in the late 12th and early 13th centuries to consolidate power amid . Regional warfare, such as the Hundred Years' War's early phases and the Reconquista's ongoing campaigns, further accelerated their proliferation, as lords upgraded keeps to withstand and scaling attacks. By around 1300, machicolations were near-universal in major European , providing a tactical edge in urban and frontier strongholds, though rarer in rural keeps where simpler hoardings sufficed due to lower threat levels and resource constraints.

Adaptations in Non-European Contexts

In the , machicolation-like features, often referred to as "shooting holes" or overhanging openings for dropping projectiles, appeared in Islamic fortress architecture prior to or concurrent with influences, serving as integral defensive elements in urban citadels. The exemplifies this, where the Ayyubid-era () entrance complex incorporates projecting salients equipped with machicolations to allow defenders to target attackers below the walls, highlighting the sophistication of medieval Arab military design at the peak of its dominance. These structures drew from earlier Islamic traditions, emphasizing elevated fortifications that integrated natural terrain for enhanced protection, distinct from later European adaptations. In and , Mughal rulers incorporated corbel-supported projections inspired by machicolation concepts, adapting them with wooden elements to suit humid tropical environments where stone alone might degrade. For instance, the in features jharokhas—overhanging balconies braced by wooden or stone corbels—that blend aesthetic and ceremonial roles in fortress-palaces, with conceptual similarities to machicolations in providing elevated overlooks. This modification reflected a fusion of Persian-Islamic influences with local climatic needs, using lighter materials to create ventilated, projecting galleries for surveillance. Colonial expansions transferred machicolation designs directly to the , where Spanish engineers integrated them into fortifications during the 16th to 18th centuries to counter indigenous resistance and pirate raids. In , structures like the presidios around employed stone machicolations in bastioned walls to enable downward fire on assailants, adapting European trace italienne principles to terrains with coral rag and local . Independent parallels to machicolation emerged in East Asian defensive architecture, though lacking true corbelled overhangs; the utilized crenellated parapets with strategic overhangs in sections like the Jiayuguan Overhanging Great Wall, where the structure itself projects over cliffs to create natural drop points for defense. These features, built from and brick during the (14th-17th centuries), prioritized sloped walls and barrier projections for repelling climbers, offering conceptual similarities in overhead assault prevention without the articulated stone galleries of Western or Islamic designs.

Notable Examples and Legacy

Iconic Structures

The in , constructed primarily in the late 14th century under Louis d'Orléans, exemplifies the use of boxed machicolations as a key defensive element, particularly over its main gates and along the upper levels of its towers and curtain walls. These protruding stone galleries featured floor openings through which defenders could drop stones, boiling liquids, or other projectiles onto attackers below the walls, enhancing vertical defense without exposing personnel. The castle's machicolations were part of a comprehensive system, including a massive keep and double moats, designed to withstand sieges during the era. Following its partial destruction in the , the underwent extensive restoration from 1857 to 1885 under architect , who reconstructed the machicolations to faithfully replicate medieval designs while incorporating 19th-century interpretations of Gothic military . This work preserved the boxed form over the gates, making them prominent visual and functional features today. Archaeological insights from the restoration reveal that original 14th-century elements, such as supports for the machicolations, were integrated into the rebuilt structure, providing evidence of evolving defensive priorities in late medieval . The site remains well-preserved as a historical , open to the public and maintained by the state since 1867. Caernarfon Castle in Wales, built from 1283 to 1330 under King Edward I as part of his campaign to conquer Wales, incorporates open machicolations integrated into its concentric walls, allowing for enfilading fire—cross-coverage of approach paths—to deter assaults on the outer defenses. These features are especially evident in the King's Gatehouse, a multi-towered structure with multiple portcullises and murder holes (a variant of machicolations) in the ceilings above passageways, enabling defenders to target enemies trapped in chicanes below. The design supported broader defensive tactics like coordinated arrow fire from wall-walks, making the castle a formidable symbol of English dominion. Recent archaeological excavations at , including a 2019–2020 dig by the , have uncovered foundational elements near the walls but confirm the machicolations' intact integration through non-invasive surveys, highlighting their role in the castle's incomplete yet robust 13th-century layout. As a World Heritage Site since 1986, the castle enjoys excellent preservation through minimal-intervention conservation, with ongoing management plans ensuring the authenticity of its defensive architecture. Krak des Chevaliers in , fortified by the Knights Hospitaller from 1142 to 1271 and later adapted by Mamluks in the late 13th century, showcases early -era machicolations in its outer walls, including complex box machicolations—enclosed projections with downward-facing slits—for protecting the perimeter against advances. These were strategically placed along the inner and outer circuits of the concentric layout, complementing arrow slits and hoardings to create layered defenses in the volatile frontier. The outer walls' machicolations reflect influences from Byzantine and Islamic fortifications, adapted for needs. Archaeological studies, including French Mandate-era surveys and post-2006 documentation, have revealed that the box machicolations at Krak were more elaborate than contemporaries like , with preserved corbels indicating reinforcements during the 13th century to counter siege engines. The castle's exceptional state of conservation, as one of the best-preserved fortresses, stems from limited modern alterations and clearance of overlying debris, though it faced minor damage from airstrikes during the (2011–present) and the 2023 earthquake; some sections have undergone restoration as of 2025, with ongoing efforts to fully repair war and seismic damage under Syrian law and oversight since 2006. Comparatively, these structures illustrate machicolations' evolution from open forms in 12th-century Crusader outposts like to integrated boxed variants in 13th–14th-century European designs at and Pierrefonds, with preservation varying by intervention: Krak's minimal restoration yields authentic Crusader insights, Caernarfon's oversight maintains structural integrity, and Pierrefonds' 19th-century rebuild offers a romanticized yet archaeologically informed view of medieval defenses. Archaeological work across sites underscores machicolations' role in enfilade tactics, providing tangible evidence of adaptive without exhaustive numerical analysis of their dimensions.

Influence on Later Architecture

During the 19th-century Romantic Gothic Revival, machicolations were revived as key elements in restorations and new designs to evoke medieval defensive grandeur. Architect prominently featured them in his work on French châteaus, restoring machicolations at the Narbonnaise gate and tower hoardings of the Cité of Carcassonne to reconstruct the site's military functionality while harmonizing form with historical purpose. These additions emphasized the machicolation's role in layered defense, such as enabling enfilading fire and dropping projectiles, thereby infusing the structures with a sense of national heritage and aesthetic vigor. Viollet-le-Duc's theoretical writings further elevated machicolations within architectural discourse, portraying them as exemplars of rational design where utility enhances beauty. In his Dictionnaire raisonné de l'architecture française du XIe au XVIe siècle, he detailed their structural integration in medieval fortifications, advocating for restorations that preserved this defensive logic rather than mere ornamentation. Similarly, in Discourses on Architecture, he described an immense machicolation at the Château de la Ferté-Milon gateway, adorned with a bas-relief of the Virgin's crowning, to illustrate how such features united practical defense with sculptural elegance in feudal architecture. The machicolation's legacy persisted symbolically in later styles, such as the of the 19th and early 20th centuries, where decorative machicolations adorned luxury homes and estates to convey baronial prestige without active defense needs. This ornamental adoption extended the form's influence into neo-medieval revivals, prioritizing evocative silhouettes over functionality in residential and public buildings. In 20th-century contexts, the overhanging principle inspired concrete projections in military bunkers, adapting the medieval enfilade to while retaining the core concept of elevated protection.

References

  1. [1]
    Glossary of Medieval Art and Architecture:machicolation
    machicolation : a gallery projecting on brackets and built on the outside of castle towers and walls,with openings in the floor through which to drop molten ...Missing: history credible sources
  2. [2]
    An Illustrated Glossary of Castle Architecture
    Jun 15, 2018 · Machicolation (Murder Hole). A hole in the projecting overhang of a wall or tower through which missiles may be dropped on the enemy and through ...
  3. [3]
    Nossov K. Machicolation: The origins // The castle studies group ...
    The article delves into the ancient origins of machicolation, a defensive architectural feature prominent in medieval military structures.
  4. [4]
    None
    ### Summary of Machicolations in Crusader Castles and Their Influence on European Architecture
  5. [5]
    Machicolations - Defending a Medieval Castle with 'Murder Holes'
    A machicolation is a little like a balcony with holes in the floor, built high on the side of a castle. Those defending a castle could throw objects through ...Missing: credible sources
  6. [6]
    Corbel - Buffalo Architecture and History
    Machicolation: In medieval fortifications, a projecting gallery or parapet supported on corbels having openings through which stones or boiling water could be ...
  7. [7]
    Machicolation - Designing Buildings Wiki
    Aug 13, 2022 · Machicolations (derivation French: machicoulis) are openings in the upper sections of castles or other fortifications through which missiles, boiling oil and ...Missing: credible sources
  8. [8]
    Box Machicolation - Ancient and medieval architecture
    Fortified machicolation boxes were made of brick, stone and timber. A similar form was also given to latrines. box machicolation on the city gate of Bystrzyca ...Missing: open semicircular
  9. [9]
    Seven Blockhouses: A Comparison of their Construction Details
    ... machicolation in the overhang to permit defenders to direct a downward fire. ... It was a framed wooden gallery three feet wide supported by huge stone corbels ...
  10. [10]
    [PDF] Baffles and Bastions: The Universal Features of Fortifications - Gwern
    Mar 5, 2007 · The walls of ancient and medieval cities were primarily defensive but also served as “customs” barriers, channeling goods through gates where ...
  11. [11]
    (PDF) 2018_Changes in the battlements and machicolations of the ...
    The research focused on the constructive characteristics of the summit defence systems on castles built in the fourteenth and fifteenth century in the Po ...
  12. [12]
    Crusader Castles - Hugh Kennedy - Google Books
    Title, Crusader Castles · Author, Hugh Kennedy · Edition, illustrated, reprint · Publisher, Cambridge University Press, 1994 · ISBN, 0521799139, 9780521799133.
  13. [13]
    13th-14th century castles | Castellogy
    These arrowslits were combined with firing positions from the tops of the towers, initially protected by wooden hoarding until stone machicolations were ...
  14. [14]
    Harlech Castle - World History Encyclopedia
    Nov 28, 2019 · In addition, 'murder holes' (machicolations) ... Since 1986 CE, Harlech castle has been listed, along with three other Welsh castles of Edward I, ...
  15. [15]
    The castles & town walls of Edward I | Cadw
    Edward had a hand in creating no fewer than 17 castles in Wales. His masterpieces are the quartet of fortresses – Beaumaris, Caernarfon, Conwy and Harlech.
  16. [16]
    [PDF] The Early Effects of Gunpowder on Fortress Design: A Lasting Impact
    Oct 25, 2015 · The introduction of gunpowder produced higher horizontal battering forces than ever, thus rendering the relatively fragile machicolation ...
  17. [17]
    Anatomy of a Castle
    As castle construction evolved to improve defenses, wooden palisade walls were eventually replaced by stone. Sometimes, palisade walls were built as a temporary ...
  18. [18]
    Château de Sully-sur-Loire: A Fairytale Fortress for All the Family
    There is a wall walk that allows you to see through the machicolations, those crenulated tops of the walls that were used for throwing objects down on marauders ...Joan Of Arc · The Duke Of Sully · Visiting Today
  19. [19]
    A circuit through the castle – a step into history! - Die Marksburg
    Above the doorway of the third gate, the "Schartentor" (Arrow Slit Gate), there is a machicolation, a little oriel from which the defenders would throw stones ...
  20. [20]
    How to Build a Castle | Berkshire Archaeological Society
    Dec 10, 2023 · Philip II Augustus, King of France from 1180-1223, is attributed with standardising the military architecture of castles in the French kingdom.<|separator|>
  21. [21]
    Ancient City of Aleppo - UNESCO World Heritage Centre
    The monumental Citadel of Aleppo, rising above the ... machicolations comprise a major ensemble of military architecture at the height of Arab dominance.
  22. [22]
    Madkhal Qal'a Halab Aleppo, Syria - Archnet
    The original Ayyubid structure consisted of two projecting salients equipped with machicolations between which was an open pathway toward the second major ...
  23. [23]
    Mughal {1526 - 1858} - Archnet > Collection > Timeline
    A jarokha is a projecting balcony supported on corbels with a hood resting on columns. Whilst all of these features may be paralleled elsewhere in Islam, the ...
  24. [24]
    [PDF] Mexican fortresses built in the 16th century. Morphology of maritime ...
    The building of fortresses in Mexico allowed the civilians and authorities more secure places to settle down, and also the missioners started a cohesion work.
  25. [25]
    The Overhanging Great Wall in Jiayuguan, Gansu Province
    The Overhanging Great Wall, built 1539-1540, looks like a painting hanging over a cliff. It is 750m long, with 400 steps to the top, and is part of a military ...
  26. [26]
    Château de Pierrefonds, a masterpiece by Viollet-le-Duc
    ... machicolations, loopholes, watchtowers, rampart walk with gargoyles, footbridges, porticoes and galleries, and stunner as well as the reconstruction of 2 ...
  27. [27]
    History of the castle of Pierrefonds
    Near Compiègne, discover the fortified castle of Pierrefonds, dismantled in the 17th century and reinvented in the 19th century by the architect Viollet-le-Duc ...Missing: machicolations | Show results with:machicolations
  28. [28]
    Britain's Best Medieval Castle Gatehouses | DigVentures
    Oct 2, 2019 · Its towers had guardrooms on the ground floor, machicolations on the third floor, as well as the castle's only gun-loops – which could all take ...Halt, Who Goes There?!... · The One Which Still Has Its... · The One With A Beautiful...
  29. [29]
    Castles and Town Walls of King Edward in Gwynedd
    All four are protected by Local Plans, Planning Guidance and their World Heritage Management Plans which are reviewed regularly; Harlech is within the Snowdonia ...
  30. [30]
    Largest ever excavation at Castell Caernarfon offers new clues ...
    Feb 3, 2021 · Castell Caernarfon's largest ever archaeological investigation has uncovered clues that will change and enhance our understanding of the site's early history.Missing: machicolations | Show results with:machicolations
  31. [31]
    Crac des Chevaliers - Discover Islamic Art - Virtual Museum
    The castle is located between the Port of Tartous and the City of Homs, sprawling on the southern buttresses of the Jabal Ansariyya, at an altitude of 650 m.
  32. [32]
    Crac des Chevaliers and Qal'at Salah El-Din
    The two castles of Crac des Chevaliers and Qal'at Salah El-Din are outstanding examples of fortified architecture relating to the Crusader period.Missing: machicolations | Show results with:machicolations
  33. [33]
    The Krak des Chevaliers - Ministère de la Culture
    The Krak des Chevaliers is a significant 12th-13th century Crusader castle, known for its military architecture and exceptional conservation.Missing: machicolations | Show results with:machicolations
  34. [34]
    [PDF] Viollet-Le-Duc's restoration of the Cité of Carcassonne
    Viol let-le-Duc was engaged in his initial restoration project for the CitS. When towards the middle of the nineteenth century the ruinous remains of the ...
  35. [35]
    Cité of Carcassonne: The Best Things to See! - French Moments
    Jun 9, 2025 · The great restoration of the Cité of Carcassonne by Viollet-le-Duc ... machicolations,; portcullises, and; heavy, reinforced wooden doors ...
  36. [36]
    Eugène-Emmanuel Viollet-le-Duc | French Architect & Restoration ...
    Sep 13, 2025 · Viollet-le-Duc can be said to have dominated 19th-century theories of architectural restoration; his initial aim was to restore in the style ...
  37. [37]
    [PDF] Discourses on architecture
    ... VIOLLET-LE-DUC. BENJAMIN BUCKNALL. ARCHITECT. ILLUSTRATED BY THIRTY-SErEiX STEEL EiXORAl'EXGS. AND IirO HUNDRED WOODCUTS. VOL. II. BOSTON. TICKNOR AND COMPANY.
  38. [38]
    Art & Architecture Thesaurus Full Record Display (Getty Research)
    Record Type: concept. Scottish Baronial (<modern British architecture styles ... machicolations, conical roofs, turrets, bartisans, and battlements.