The Massacre of Kalavryta (Greek: Σφαγή των Καλαβρύτων), or the Holocaust of Kalavryta (Ολοκαύτωμα των Καλαβρύτων), refers to the extermination of the male population and the total destruction of the town of Kalavryta, in Greece, by German occupying forces during World War II, on 13 December 1943. Aside from the deportation and murder of over 80% of Greece's Jewish population, it is the most serious case of war crimes committed during the Axis occupation of Greece during World War II.