As a compromise with conservatives, the word "Mass" was kept, with the service titled "The Supper of the Lord and the Holy Communion, commonly called the Mass." It also preserved much of the medieval structure of the Mass—stone altars remained, the clergy wore traditional vestments, much of the service was sung, and the priest was instructed to put the communion wafer into a communicant's mouth instead of in their hand. Nevertheless, the first BCP was a "radical" departure from traditional worship in that it "eliminated almost everything that had till then been central to lay Eucharistic piety".