The heresy of Nestorianism, which held that Jesus was 2 separate persons, began in this Byzantine capital
.... 
as erroneous and decreed that Jesus was one person, not two separate people:
... [DOC] [TLE] The Great Heresies | Catholic Answers [PAR] Paul told his young protg, Timothy, "For the time is coming when people will ... 
let's look at some of the major heresies of Church history and when they began.