St. Andrew was not canonized. He was proclaimed a saint by early Christians because of his martyrdom by crucifixion. The canonization process did not come into existence until the 12th century. In...
The origin of the festival of All Saints as celebrated in the West dates to May 13, 609 or 610, when Pope Boniface IV consecrated the Pantheon at Rome to the Blessed Virgin and all the martyrs; the...