Hadrian’s agonistic calendar, as it was found inscribed in a stele of Alexandria Troad, mentions within its fourth Olympic year the “games of the Koinon of the Achaeans and Arcadians which are celebrated in Mantinea”. Following the interpretation of the editors of the stele, G. Petzl and E. Schwertheim, this article aims to identify these games as those which were organized by the city in honour of Antinous. The epigraphic sources that mention the Mantinean games, mainly those related to the (...) agonothetai and winners of the contests, will be used to explore the relationship between Hadrian and the Arcadian cults, and similarities between the sequence of games in the athletic palmares and Hadrian’s calendar in order to further support the identification as the Antinoeia of Mantinea. (shrink)