Kwadrato wa Athens (Athens, Ugiriki, karne ya 1 - Athens, 129) alikuwa mwanafunzi wa Mitume ambaye alieneza na kutetea Ukristo hata kwa maandishi maarufu. Habari zake tunazipata kutoka kwa mwanahistoria Eusebi wa Kaisarea. Inasemekana alikuwa askofu wa Athens, lakini wengine wanasema si habari ya hakika. Tangu kale anaheshimiwa na Kanisa Katoliki na Waorthodoksi kama mtakatifu. Sikukuu yake huadhimishwa tarehe 21 Septemba. Watakatifu wa Agano la Kale Orodha ya Watakatifu Wakristo Orodha ya Watakatifu wa Afrika Orodha ya Watakatifu Wafransisko Mababu wa Kanisa Walker, Williston (1985). The History of the Christian Church, 4th, New York: Simon & Schuster, 53. ISBN 9780684184173.  In his Ecclesiastical History, Book IV, chapter 3, Eusebius records that: 1. After Trajan had reigned for nineteen and a half years Ælius Adrian became his successor in the empire. To him Quadratus addressed a discourse containing an apology for our religion, because certain wicked men had attempted to trouble the Christians. The work is still in the hands of a great many of the brethren, as also in our own, and furnishes clear proofs of the man's understanding and of his apostolic orthodoxy.