The Council of Chalcedon in 451, is one of the church's most formative, important, and controversial ecumenical councils - and considering the massive bulk of Pope Leo I's episode, we've set aside an entire episode for Chalcedon. In this episode, we'll discuss the major factions of the Christological debate, the balance between the Tome of Leo and the Anathemas of Cyril, the Robber Synod, and the implications that orthodoxy will have for future popes.