. To us, who have Mass in our churches every day, and who know that priests usually offer the Holy Sacrifice daily, it may seem strange that it was not always thus. In the first centuries the bishops and priests celebrated together—one Mass, said by several. The only vestige of this practice that remains is in the Mass of Ordination, in which the newly ordained priests say Mass jointly with the bishop, though they do not partake of the same Host nor of the Precious Blood.