Michael Haydn completed the Missa in honorem Sanctae Ursulae, Klafberg I:18, MH 546, on August 5, 1793, probably for use at the ceremony in which Ursula Oswald, the daughter of a friend, professed her religious vows at the Benedictine Abbey of Frauenwörth Chiemsee. Because of that fact, the Mass is sometimes known as the Chiemsee Mass.