The Church of All Nations (also called Gethsemane Church or in common lingo - "The Church of Grief") is a catholic church which is kept in the hands of the Franciscan monks and is one of the most fanciest and splendid churches in Israel . The church lies at the foot of Mount Olives , on the border of Kidron valley and in front of Temple Mount. The church marks the place where Jesus spent his last night after the Last Supper. Christian tradition in claims.