 Complete the following phrase:  In 1538, Antoine claimed the titles of Duke of Guelders and Count of Zutphen upon the death of Charles of Egmond, but was unable to gain possession of them. He married his heir, Francis to Christina of Denmark, niece of Charles V, in 1541, and with the Treaty of Nuremberg 26 August 1542, Antoine obtained from Charles V the independence of the Duchy of Lorraine. He interceded at the start of Francis and Charles 