Alger of Liège

Alger of Liège (1055–1131), known also as Alger of Cluny and Algerus Magister, was a learned clergyman and canonist from Liège, author of several notable works.

Alger was first deacon and scholaster of church of St Bartholomew in his native Liège and was then appointed as a canon in St. Lambert's Cathedral. Moreover, he acted as the personal secretary of bishop Otbert from 1103. He declined offers from German bishops and finally retired to the monastery of Cluny after 1121, where he died at a high age, leaving behind a solid reputation for piety and intelligence.

He played a leading role in the trial of Rupert of Deutz in 1116. De Sacramentis Corporis et Sanguinis Domini; a treatise, in three books, against the Berengarian heresy, highly commended by Peter of Cluny and Erasmus, who published it in 1530. In this book, Alger also took on Rupert of Deutz' views on the Eucharist and predestination. De Gratia et Libero Arbitrio; given in Bernard Pez's Anecdota, vol. iv. De Sacrificio Missae; given in the Collectio Scriptor. Vet. of Angelo Mai, vol. ix. p. 371.

A biography was written by Nicholas of Liège: De Algero veterum testimonia.