Quadratus of Athens was a second-century Christian apologist and bishop who is traditionally identified as a disciple of the Apostles. Born in Anatolia, he later moved to Athens, where he served as a teacher and preacher. He is most famous for delivering an apology to Emperor Hadrian, in which he defended the Christian faith by citing the lasting impact of the miracles performed by Jesus. Some traditions also recognize him as the successor to Saint Publius as the Bishop of Athens.