LAUDA Sion Salvatorem,lauda ducem et pastorem,in hymnis et canticis! (Lauda Sion, St. Thomas Aquinas)
(Praise O Sion, your Saviour, in hymns and canticles praise your Shepherd and King!).
Aquinas' beautiful words (go to http://www.preces-latinae.org/thesaurus/Hymni/LaudaSion.html for words and translation) for the sequence of Corpus Christi and the chant melody that carries them are seldom sung these days. That's a real pity, since they are a part of Catholic tradition that is very worth preserving. Perhaps with the greater interest in recovering the past that seems to be increasing lately they will be rescued from near oblivion.
They've been a part of my life for many years. In my parish church of St. Jean Baptiste in New York, which is in the care of the Congregation of the Blessed Sacrament and is a center of Eucharistic adoration (http://www.stjeanbaptisteny.org), the words of this hymn run, in huge gilded letters, on a band of wall, high above the floor.
There is a great deal to be said about the feast of Corpus Christi and about the representation of the Eucharist in western art, but for now I just want to include this sketch of ca. 1630 by Rubens for an Altarpiece of the Blessed Sacrament (New York, Metropolitan Museum of Art). It was eventually painted for the Shod Carmelite church in Antwerp by his followers Gerhard Seghers and Johannes van Mildert. The sketch is being featured on the opening page of the Metropolitan Museum website. Thank you, Met for remembering the day!