[1] Burchard was jointly involved with his father in the governance of the Aosta Valley from April 8, 1022, perhaps as coadjutor beforehand to ensure the succession of his maternal uncle as bishop of Aosta in 1025.
[2] He was mentioned as bishop of Aosta on October 19, 1024 in a deed of gift alongside his father Humbert.
On 10 March 1026 Buchard was transferred to the archbishopric of Lyon, which proves the assertion of regional power by his family.
[3] According to the chronicler Raoul Glaber, who specifies that he was the nephew of his predecessor, Burchard II of Lyons in the seat of Lyon, he takes the side, with Gerold Geneva Odo II, in the succession dispute King, who opposed his uncle, the Emperor Holy Roman Emperor Conrad II, called the Salic, Duke of Franconia.
[5] Released in 1039 by Henry III on condition that he withdraw into territory of Saint Maurice Abbey, he became "Agannensis abbatia Abbas',[6] where he is mentioned for the last time in an act of July 10, 1068, although the necrology of the primatial St. John Lyon lists his death as occurring on June 10, 1046.