After the last Mass today, chatting with the music director, I mentioned how the "golden oldie" hymns associated with the Eucharist come from this feast, and were written by St. Thomas Aquinas. And several are still in the Office which we still pray:
Vespers hymn: Pange Lingue Gloriosi -- used also on Holy Thursday, and the last two stanzas begin, "Tantum Ergo...".
Matins (Office of Readings) hymn: Sacriis Sollemniis -- a hymn I imagine almost no one has heard of -- until you get to the last two stanzas (stanzae?): "Panis angelicus"!
Lauds (Morning prayer) hymn: Verbum Supernum, again not so familiar...until the last two stanzae: "O Salutaris Hostia..."! (Was it customary, in the years prior to the unfortunate abandonment of all Latin, if the hymn was too long for parishes, merely to sing the latter two verses, which is why they are so familiar? Does anyone know?)
Mass: Lauda Sion a sequence now optional, and which is very long; it was recited, at least a shorter section of it, at several Masses here. (I did not have anyone recite it, because I would prefer to have it sung; reciting sequences seems rather limp. That said, if they are required, they get recited if they can't be sung.)
Also, he wrote Adore te Devote, which I find very beautiful; but if written for this feast, I'm not sure how it was used. (Remember, hymns are not the norm for Mass; rather, psalm-based chants are called for at the opening, offertory and communion processions, and there is no post-communion or closing hymn really called for in the Mass. The chants fell out of use somewhere along the line. I don't know how widely used they were before the Council, but because only the refrain was translated in the revised Mass -- that's the "entrance antiphon" that appears in the missallette -- it isn't practical to use as intended; and the closing hymn is just something that came in at some point.)
I can't find that he wrote any other hymns for the Office of Corpus et Sanguinis Christi -- nothing for the little office we now call Midday Prayer, or for Compline, or Night Prayer. Does anyone know?