Pope St. Pius V (1504-1572) was born in Italy to a humble family. From a young age, he was formed and well educated by the Dominicans. He entered the order and was ordained a priest at the age of 24.

The Latin Mass, which was formalized by Pope St. Pius V in 1570 and continues to be practiced by some Catholics today, has several key differences from the more common Vatican II mass, which was ...