Saint Thomas Aquinas composed Sacris Solemnis at the command of Pope Urban IV for the new feast of Corpus Christi in 1264. The last two stanzas have become the hymn Panis Angelicus. I have always viewed this as the heart of the Summa set to music.
When he was canonized in 1323 some objections were raised because of a lack of miracles relating to the Angelic Doctor. Pope John xxii responded that every question Saint Thomas answered was a miracle.