The Vienna Boys' Choir was founded in 1498 and is one of the best known boys' choirs in the world. Among many great musicians that the choir has worked with through the centuries are Wolfgang Amadeus Mozart, Antonio Caldara, Antonio Salieri, Heinrich Isaac, Paul Hofhaimer, Heinrich Ignaz Biber, Johann Fux, Christoph Willibald Gluck, and Anton Bruckner.
The Regina Coeli is sung in place of the Angelus during the Easter season, from Holy Saturday through Pentecost Sunday. The author is unknown, although legend has it that St Gregory the Great heard angels chanting the first three lines one Easter morning in Rome, while following in procession the icon of the Virgin painted by Saint Luke the Evangelist. The setting of Regina Coeli performed above by the Vienna Boys' Choir is one of three composed by Mozart.