The Feast of Corpus Christi is celebrated on the Thursday after Trinity Sunday, so this year it falls on May 30. From the New Catholic Encyclopedia,
“This feast, still known popularly as Corpus Christi, celebrates the mystery of the enduring presence of the Body and Blood of Christ in the sacrament of the Holy Eucharist. The name Corpus Christi (“the body of Christ”) is an abbreviation of the name of the feast in the Missal of Pius V (1570), festum sanctissimi corporis christi (“the feast of the most holy body of Christ”).”
Connell, M. F. “Corpus et Sanguis Christi, Solemnity of.” New Catholic Encyclopedia. 2nd ed. Vol. 4. Detroit: Gale, 2003. 272. Gale Virtual Reference Library. Web. 28 May 2013.
The feast popularly includes a Eucharistic procession in which the Priest carries the host in vessel called a monstrance. Here are some photos from the University Photographs Collection of a Corpus Christi mass and procession at Loyola, circa 1900.
Found in the Archives is a recurring series of crazy cool stuff found in the Monroe Library’s Special Collections & Archives.