He had previously been a monk of the Benedictine Mont César Abbey in Leuven, and been deeply involved with the liturgical movement in Belgium. He made an important contribution on unity with Anglicans in 1925 when invited by the participants in the Malines Conversations. When he came to know the Christian East, he realized the extent to which the Churches are divided and started to work on the foundation of the present monastery at Chevetogne (earlier at Amay sur Meuse) devoted to Christian unity.
- Louis BOUYER, Dom Lambert Beauduin. Un homme d' Eglise, Casterman, Tournai - Paris, 1964
- Sonya A.QUITSLUND, Beauduin. A prophet vindicated, Newman Press, New York - Toronto, 1973
- Unité des Chrétiens, no. 29, janvier 1978: Dom Lambert Beauduin (1873-1960):le moine de l'Union, ed. Etienne FOUILLOUX & Jacques DESSEAUX