Pavao Dalmatin was lecturing canonical law at the University of Bologna. His book “Summa poenitentia” (1220) had been rewritten in as many as fifty copies in the period between the 13th and 15th century, that are now held in many European libraries. It also had three printed editions in the 18th, 19th and even in the 20th century. This book represents the first known manual of moral theology for confessionals. Pavao Dalmatin was a collaborator and a good friend to St. Dominic.