When Pope Urban IV decided to extend the feast of Corpus Christi to the universal Church, he wisely chose the great Dominican theologian, St. Thomas Aquinas, to compose the Mass and Liturgy of the Hours for this great feast. Thus he bequeathed to us the Sacris Solemniis with its Panis Angelicus, the Verbum Supernum, the Lauda Sion, the Adoro …