The Feast of Corpus Christi (“Fronleichnam” in German) is a Catholic festival celebrated on the second Thursday after Pentecost. This celebration emerged slowly through the efforts of a nun called Juliana of Liège in the second half of the thirteenth century. A bishop agreed with her and convened a synod in 1246 which ordered the annual celebration of Corpus Christi on a Thursday. As part of the celebration in Medieval Europe, Corpus Christi included the performance of mystery plays that explained in simple terms the teaching of the Church. 

The Feast is celebrated primarily by Roman Catholics, however, a few Anglican churches and some Western Rite Orthodox Christians also recognized the feast.