An antipope is a person who, in opposition to the one who is generally seen as the legitimately elected Pope, makes a significantly accepted competing claim to be the Pope, the Bishop of Rome and leader of the Catholic Church.  At various times between the 3rd and mid-15th century, antipopes were supported by a fairly significant faction of religious cardinals and secular monarchs and kingdoms[1].

Bellairs Corpus


  1. Wikipedia: Antipope