O magnum mysterium -- Adrian Willaert (c. 1490-1562)[sdg-pt] post_id: 31077 post not webcast eligible (post_is_webcast_eligible for post_id 31077) Title: O magnum mysteriumComposer(s): Adrian Willaert (c. 1490-1562)Performances at Saint Thomas Church:Festal Eucharist, 2021-12-26