What happened next?
The Church of Constantinople came under threat of the Islamic Arabs. So they introduced Muslim customs and instituted Iconoclasm. Rome wanted no part of it, introducing music to their religious ceremonies as a sign of rebellion. So the Byzantines aligned with The Lombards to defend their city and bring Rome in line. The Pope appealed to the King of the Franks who promptly came in and cleaned house. Pepin allowed the Lombards to retain their independence but the message was sent. "Rome she's a no go".