Dom Lambert Beauduin was a Belgian

Belgium

Belgium , officially the Kingdom of Belgium, is a federal state in Western Europe. It is a founding member of the European Union and hosts the EU's headquarters, and those of several other major international organisations such as NATO.Belgium is also a member of, or affiliated to, many...

 monk who founded the monastery now known as Chevetogne Abbey

Chevetogne Abbey

Chevetogne Abbey, also known as the Monastery of the Holy Cross, is a Roman Catholic Benedictine monastery dedicated to Christian unity located in the Belgian village of Chevetogne in the municipality of Ciney, province of Namur, halfway between Brussels and Luxembourg...

 in 1925.
He had previously been a monk of the Benedictine Mont César Abbey in Leuven

Leuven

Leuven is the capital of the province of Flemish Brabant in the Flemish Region, Belgium...

, and been deeply involved with the liturgical movement

Liturgical Movement

The Liturgical Movement began as a movement of scholarship for the reform of worship within the Roman Catholic Church. It has grown over the last century and a half and has affected many other Christian Churches, including the Church of England and other Churches of the Anglican Communion, and some...

in Belgium. 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 devoted to Christian unity.