Liebert, Reginaldus, Burgundian composer who flourished in the early 15th century. He most likely was master of the boy choristers at Cambrai Cathedral in 1425. He was the composer of the Missa De Beata Virgine for 5 Voices (see G. Reaney, ed., Early Fifteenth Century Music, Corpus Mensurabilis Musicae, III, 1966), historically significant as a summation of the Franco-Flemish style of the preceding 14th century in its treatment of counterpoint and cantus firmus and as a harbinger of the great cyclic masses of the 15th century in its display of a unified musical structure. His other extant works comprise a Kyrie for 4 Voices and 2 secular chansons.
—Laura Kuhn/Dennis McIntire