One of the more controversial teachings of the Catholic church deals with the perpetual virginity of Mary. This doctrine maintains that Mary remained a virgin after the birth of Jesus and that biblical references suggesting Jesus had siblings are really references to cousins (Catechism of the Catholic Church, paragraph 510). As the veneration of Mary increased throughout the centuries, the vehicle of Sacred Tradition became the means of promoting new doctrines not explicitly taught in the Bible. The virginity of Mary is clearly taught in scripture when describing the birth of Jesus. But is the doctrine of her continued virginity...