Berliner Messe (or Berlin Mass) is a mass setting by Estonian composer Arvo Pärt. Commissioned for the 90th Katholikentag in Berlin in 1990, it was originally scored for SATB soloists and organ. It was first performed at St. Hedwig's Cathedral on 24 May 1990, the Feast of the Ascension, with Paul Hillier conducting the Theatre of Voices. Pärt later (1997) revised the piece for chorus and string orchestra. Pärt uses his tintinnabuli technique throughout, with movements taking many forms within that style—flowing from quietly reverent duets between parts to full chorus proclamations of faith.