A high ranking churchman, such as a bishop (who ran all the churches in a particular region), archbishop (who supervised several bishoprics), primate (seniormost bishop in a country), or cardinal (in Medieval times a title usually reservved for members of the Church's central administration. The nobility and princes of the Church. The lower levels of the clergy included acolytes (altar boys), seminarians (apsirant priests), priests (authorized to deliver the sacraments), pastors (chief priest of a church), monsignor (a distinction often rendered a distinguished priest), and deans (who had supervision over several churches, under a bishop).
Then there were the members of the various monastic orders, both male and female.