Listen to Missa in C KV262 "Missa longa": Agnus Dei online. Missa in C KV262 "Missa longa": Agnus Dei is an English language song and is sung by Peter Neumann/Kölner Kammerchor/Collegium Cartusianum Köln/Franz-Josef Selig/Christoph Prégardien. Missa in C KV262 "Missa longa": Agnus Dei, from the album Mozart: Sämtliche Messen / Complete Masses, was released in the year 2011. The duration of the song is 4:50. Download English songs online from JioSaavn.