Martin I was the Bishop of Rome from 649 to approximately 654. Originally serving as a papal legate in Constantinople, he was elected to the papacy without seeking the customary approval from the Byzantine emperor. He is primarily remembered for his firm stance against Monothelitism, a theological doctrine supported by the imperial court. This opposition led to his arrest by Emperor Constans II, his subsequent imprisonment, and his eventual exile to Cherson, where he died in 655. He is recognized as a saint in the Catholic, Orthodox, and Anglican traditions.