De institucione festi corporis Cristi.
The Institution of the Feast
Pope Urban IV instituted the feast of Corpus Christi in 1261, later confirmed by Pope Clement V at the Council of Vienne in 1310.
In the year of the Lord 1261, Pope Urban IV instituted the feast of the Body of Christ, which was afterwards confirmed at Vienne by Pope Clement V in a general council in the year 1310. (Ptol —25.)
Read the original Latin
Anno domini MCCLXi Urbanus papa IUI instituit festum corporis Cristi, quod postea Vienne a Clemente papa v in concilio generali anno MCCCX confirmatum fuit. (Ptol —25.)
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