who is credited with collecting and codifying the chants of the medieval church
Gregorian chant John the Deacon, biographer (c. 872) of Pope Gregory I, modestly claimed that the saint "compiled a patchwork antiphonary",[11] unsurprisingly, given his considerable work with liturgical development. He reorganized the Schola Cantorum and established a more uniform standard in church services, gathering chants from among the regional traditions as widely as he could manage. Of those, he retained what he could, revised where necessary, and assigned particular chants to the various services.[12] According to Donald Jay Grout, his goal was to organize the bodies of chants from diverse traditions into a uniform and orderly whole for use by the entire western region of the Church.[13] His renowned love for music was recorded only 34 years after his death; the epitaph of Honorius testified that comparison to Gregory was already considered the highest praise for a music-loving pope.[11] While later legends magnified his real achievements, these significant steps may account for why his name came to be attached to Gregorian chant.