Peter went to Constantinople at some point before 535, possibly as early as 532/533. There he preached the Miaphysite doctrine openly against the Chalcedonian. Condemned by the Council of Constantinople in 536, he left the city later that year. The Emperor Justinian I issued a novella condemning Peter as a heretic on 8 August 536. Peter was explicitly prohibited from spreading his doctrine. He was banned from the capital and other major cities and is not heard of again. He probably died not long after 536. He was certainly dead by 544/545 (year 856 of the Seleucid era).
