 Prior to the Second Vatican Council (1962-65), as a general rule, churches in which the Divine office was to be said publicly every day also had to have Mass said daily.This Mass was the "conventual" Mass ("missa conventualis"); it completed, with the canonical Hours, the official public service of God in such a church.A conventual Mass then was to be sung or said in all cathedrals and collegiate churches that had a chapter; in this case it was often called the "chapter" Mass ("missa capituli"), though the official books constantly used the general name "conventual" for this Mass too.