Listen to Missa in C, KV66 "Dominicus-Messe": Et unam sanctam online. Missa in C, KV66 "Dominicus-Messe": Et unam sanctam is an Unknown language song and is sung by Peter Neumann/Collegium Cartusianum Köln/Kölner Kammerchor/Barbara Schlick/Ulla Groenewold/Markus Schäfer/Klaus Mertens. Missa in C, KV66 "Dominicus-Messe": Et unam sanctam, from the album Mozart: Sämtliche Messen / Complete Masses, was released in the year 2011. The duration of the song is 2:28. Download Unknown songs online from JioSaavn.