Prior to the council, a Eucharist celebrated in public was categorized as a missa lecta (a "read" or "low" Mass--all the ritual texts spoken by a priest celebrant and server[s]), or a
missa cantata (a "sung" or "high" Mass--the majority of ritual texts chanted) or a missa solemn is (a "solemn" Mass, which was a
missa cantata celebrated with the assistance of a deacon and subdeacon).