Lodovico Grossi da Viadana (c.1560 1627) was an Italian composer teacher and Franciscan Friar. He is known for the important contribution he made to the development of Baroque music being one of the first people touse figured bass as a means of notating a basso continuo line. From 1594 onwards he was choirmaster at various Italian cathedrals when his O Sacrum Convivium was most probably written. It is an arrangement of theancient Christian prayer for TTBB Male Voice Chorus and is a perfect anthem for any Eucharist service.