The fourth ecumenical council, held in Chalcedon in AD 451, attempted to bring resolution to the heated Christological and trinitarian debates that had racked the first half of the fifth century. Producing what would become the Church's most concise Christological definition, the council did not itelf end the discussions, but rather became the reference point for a new period of debate. This area assembles together a number of texts and materials related to the council.