A trial in #Constantinople opened #ThisDayInHistory in 653. Facing the anger of the #Roman imperial court was #PopeMartinI, the last #Pope to become a #martyr for #RomanCatholicism. Martin was convicted of opposing #Monothelitism & banished to #Cherson on #Crimea. He died in 655.

On #ThisDayInHistory in 680, the #ThirdCouncilOfConstantinople, aka the #SixthEcumenicalCouncil, opened in #Constantinople under #ConstantineIV. It met to discuss (then condemn) #monothelitism & #monoenergism, deciding instead that Jesus Christ had two wills and two energies.