Philip of Burgundy
On 10 August 1501 at Lyon the marriage contract between Claude and the future Holy Roman Emperor Charles V was signed by François de Busleyden, Archbishop of Besançon, William de Croÿ, Nicolas de Rutter and Pierre Lesseman, all ambassadors of Duke Philip of Burgundy, Charles' father. A part of the contract promised the inheritance of Brittany to the young prince, already the next in line to thrones of Castile and Aragon, Austria and the Burgundian Estates.