Missa Solemnis is a significant choral work composed by Ludwig van Beethoven between 1819 and 1823. It is a setting of the Roman Catholic Mass and is known for its grandeur and complexity. The piece is structured in five movements, showcasing Beethoven's innovative use of orchestration and vocal harmony. The composition was originally intended for the coronation of Archduke Rudolf of Austria, but it was not performed until 1824. Missa Solemnis is celebrated for its emotional depth and spiritual intensity, making it one of Beethoven's most important works in the choral repertoire.