Archbishop Alexis van der Mensbrugghe was born in Belgium in 1899. He became a Roman Catholic Benedictine monk in a [[monastery]] at Amay-sur-Met. In April 1929, he was received into the Orthodox Church by Metr. [[Eulogius (Georgievsky) of Paris|Eulogius of Paris]]. When the Western Church's [[St. Denys Theological Institute (Paris, France)|St Denys Theological Institute]] opened in Paris, Archim. Alexis occupied the chair of Patristic Theology and Ancient Liturgies while he remained in the Eastern rite.
Archim. Alexis became associated with the group led by [[Jean-Nectaire (Kovalevsky) of Saint-Denis|Evgraph Kovalevsky]] under the Church of Russia that was working to restore a Gallican liturgical usage based on correspondence of the sixth century Bishop of Paris St. Germanus. The rite became known as the [[Divine Liturgy according to St Germanus of Paris]]
Archim. Alexis was consecrated a [[bishop]] of the Church of Russia's episcopate on [[November 1]], 1960, with the title of Bishop Meudon, [[auxiliary bishop]] of the then West European Exarchate, while he continued his Western Rite work under the auspices of the Moscow Patriarchate.