The Missa solemnis in D Major, Opus 123, is a Solemn Mass composed by Ludwig van Beethoven from 1819 to 1823. It was first performed in April 1824 in Saint Petersburg, Russia, under the auspices of Beethoven’s patron Prince Nikolai Galitzin; an incomplete performance was given in Vienna in May 1824, when the Kyrie, Credo, […]