St. Aristides was a convert to Catholicism living in Athens during the reign of Emperor Hadrian. He is best known as an apologist and philosopher who composed a treatise in defense of Christianity.
Persecution had once again raised its head in the Roman empire following the emperor's initiation into the Eleusinian Mysteries. This act had caused a flare up of pagan zeal leading to persecution of Christians. In response to this, Aristides composed his apologetic treatise and delivered it to the emperor while he was staying in Athens in 126 a.d.
Aristides is believed to have passed away between 133 and 134 a.d.