Messe solennelle is a setting of the Catholic Solemn Mass by the French composer Hector Berlioz. It was written in 1824, when the composer was twenty, and first performed at the Church of Saint-Roch in Paris on 10 July 1825, and again at the Church of Saint-Eustache in 1827. After this, Berlioz claimed to have destroyed the entire score, except for the "Resurrexit", but in 1991 a Belgian schoolteacher, Frans Moors, came across a copy of the work in an organ gallery in Antwerp, and it has since been revived.