Cyrus of Constantinople
During his reign, the Byzantine Empire was affected by the followers of Monothelitism and Monophysitism. Followers of those sects insisted that accommodation would make it possible to regain Syria, Armenia, Mesopotamia, Egypt, etc. which were lost to the Arabs.
Emperor Philippicus indeed accommodated Monothelitism and Monophysitism and, as a result, met with the opposition of Patriarch Cyrus.
Eventually, Philippicus exiled Cyrus to the monastery of Chora, outside the walls of Constantinople.
Cyrus died in exile. He was declared a saint by the Orthodox Church and his memory is celebrated on January 8.