Saint Pius I (Subscribe)
Links
The Ecole Glossary
http://www2.evansville.edu/ecoleweb/glossary/piusi.html
Very short biographical summary, by Karen Rae Keck.
Popes Through the Ages
http://www.cfpeople.org/Books/Pope/POPEp10.htm
Account of the pontificate of St. Pius I, from the book by Joseph Brusher.
Catholic Encyclopedia
http://www.newadvent.org/cathen/12126b.htm
Pope St. Pius I excommunicated Marcion, and died in about 154.