After his wife's death in 1119, he left this world with 16 of his vassals and entered the Cistercian monastery of the abbey of Bonnevaux.
[1] The son soon moved on to the court of Emperor Henry V in order to learn life as a knight and prepare for an aristocratic career.
[2] “Through him, the monastery achieved a high level of spiritual perfection and temporal prosperity.”[3] Pope Lucius II elevated Amadeus to the bishopric of Lausanne in 1144.
It was a difficult diocese, and in a letter he tells of how his vestments were stained red by the blood of a murdered man while the bishop tried in vain to protect him.
[2] He met with the guardian bailiff of the city, Berthold IV, Duke of Zähringen to arrange cooperative relations.
The seventh homily is particularly relevant, since Pope Pius XII quoted from it in his Apostolic Constitution Munificentissimus Deus (1950) regarding the Assumption of Mary.
Amadeus of Lausanne is depicted as a Cistercian bishop with princely insignia who receives a pair of gloves from the Mother of God.