Catholic Encyclopedia - St. Peter of Verona, the son of Manichæans, became a Dominican. He was martyred in 1252, and canonized only one year later. www.newadvent.org/cathen/11773d.htm
For All the Saints - Hagiography of St. Peter Martyr. users.erols.com/saintpat/ss/0429.htm#pete
Patron Saints Index - Illustrated profile. www.catholic-forum.com/saints/saintp23.htm