Hadrian
Publius Aelius Hadrianus (24 January AD 76 – 10 July AD 138) was Roman emperor from 11 August AD 117 to his death, succeeding Trajan as the fourteenth emperor of the Principate.[1][2] Born to a Roman senatorial family with roots in Italica, Hispania Baetica (near modern Seville, Spain), Hadrian rose through military and administrative roles, including service in provinces like Germania and Syria, before his adoption by the childless Trajan shortly before the latter's death.[3][4] Hadrian's reign emphasized defensive consolidation over expansion, withdrawing Roman forces from Trajan's recent conquests in Mesopotamia and Armenia to fortify natural and artificial frontiers, exemplified by the construction of Hadrian's Wall in northern Britain around AD 122 to demarcate the empire's boundary against Caledonian tribes.[1][5] This policy reflected a pragmatic recognition of the empire's overextension, prioritizing internal stability and resource allocation amid fiscal strains.[1] He undertook unprecedented imperial tours, visiting nearly every province to oversee administration, infrastructure, and military readiness, fostering loyalty through personal engagement while reforming legal codes, provincial governance, and the alimenta system for child welfare.[6] A patron of Hellenic culture and architecture, Hadrian rebuilt the Pantheon in Rome with its iconic dome, completed the Temple of Olympian Zeus in Athens, and developed his vast Villa at Tivoli as a retreat blending Roman, Greek, and Egyptian motifs.[7] His philhellenism extended to adopting Greek customs, such as wearing a beard, and deifying his companion Antinous after the youth's drowning in the Nile, erecting numerous statues and founding Antinoopolis in his honor.[8] However, his policies provoked the Bar Kokhba revolt in Judaea (AD 132–136), triggered by plans to rebuild Jerusalem as Aelia Capitolina and restrictions on Jewish practices, which Hadrian suppressed with overwhelming force under generals like Julius Severus, resulting in massive casualties, the depopulation of Jerusalem, and renaming the province Syria Palaestina to erase Jewish ties.[9][10] These actions underscored Hadrian's commitment to Roman order but at the cost of cultural suppression and long-term resentment.[9] His later years involved succession struggles, adopting Antoninus Pius with conditions to include future successors, before succumbing to illness at Baiae.[1]