Israel, Jerusalem, St. Peter Gallicantu, The Church of Saint Peter in Gallicantu is a Roman Catholic church built on the traditional location of the palace of Caiaphas, the high priest, on the eastern slope of Mount Zion, just outside the wall of the Old City of Jerusalem. It is the traditional site of the trial of Jesus by the Sanhedrin, where Peter denied the Christ three times before the cock crowed, thus the name Gallicantu..