Tome of Leo

A letter addressed by Leo I* to the Patriarch Flavian* of Constantinople in 449, containing a lucid and systematic exposition of the Catholic doctrine of the Incarnation. The occasion of the Tome was chiefly the appeal made to Leo by Eutyches* after he had been deposed for Monophysitism* by Flavian. The Tome, which upheld Flavian's condemnation of Eutyches, was endorsed by the Council of Chalcedon* two years later.