Stimulus was provided about 1270 by Jean de Châlons-Rochefort, who had recently become Count of Auxerre, having supported the Duke of Burgundy against his own brother, by marrying Alix, the heiress of Auxerre.
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Auxerre Cathedral (Cathédrale Saint-Étienne d'Auxerre) located in Auxerre, Burgundy, France, is known for its expansive stained glass windows.
Berthier was born in Auxerre, Burgundy; both of his parents were musicians - his father Paul was the kapellmeister and organist at the Auxerre Cathedral.
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