The full name of this feast is Corpus et Sanguis Christi or The Body and Blood of Christ. "The feast of the Blessed Sacrament was established in 1246 by Bishop Robert de Thorte of
at the suggestion of St. Juliana of Mont Carvillon. [It was] extended to the
universal Church by Pope Urban in 1264. The office composed by St. Thomas
Aquinas and customary procession was approved by Popes Martin V and Eugene IV.
Celebrated in June, the first Sunday after the feast of the Trinity."
St. Juliana, a Belgian nun in Retinne, lived at the time of St. Thomas Aquinas and
She received this inspiration from Our Lord for the following reasons: 1) that
the Catholic doctrine receive aid from the institution of this festival at a
time when the faith of the world was growing cold and heresies were rife; 2)
that the faithful who love and seek truth and piety may be enabled to draw from
this source of life new strength and vigor to walk continually in the way of
virtue; 3) that irreverence and sacrilegious behavior towards the Divine
Majesty in this adorable Sacrament may, by sincere and profound adoration, be
extirpated and repaired; 4) to announce to the Christian world His will that
the feast be observed. St. Louis