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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* two years later.