Pope Martin I is arrested and taken to Constantinople, due to his opposition to monothelitism.

Pope Martin I, also known as Martin the Confessor, was the bishop of Rome from 21 July 649 to 653 or 654. He had served as Pope Theodore I's ambassador to Constantinople, and was elected to succeed him as pope. He was the only pope when Constantinople controlled the papacy whose election had not awaited imperial mandate. For his strong opposition to Monothelitism, Pope Martin I was arrested by Emperor Constans II, carried off to Constantinople, and ultimately banished to Cherson. He is considered a saint by both the Catholic Church and the Eastern Orthodox Church, as well as the last pope recognised as a martyr.