Missa solemnis in C major, KV 66 "Dominicusmesse"

Mozart composed the mass for the ordination of Cajetan Hagenauer, son of Lorenz Hagenauer, the Mozarts' landlord and family friend. Cajetan had entered St Peter's Abbey, a Benedictine monastery, whilst the Mozarts were on their grand tour. When he became a priest in 1769, he took the name Pater Dominicus and celebrated his first solemn high mass; this gives the work its nickname, Dominicusmesse. Leopold Mozart conducted the première on 15 October to a packed church in Salzburg; it is thought that the success of this performance led to Wolfgang's first Italian tour.