Louis I, Duke of Orléans
For his court, Gian Galeazzo preferred Pavia to Milan. There he continued to develop the renowned library of the castle and to support the local university. The relationship between Gian Galeazzo and the French royal family, interrupted by the death of his first wife Isabelle, was revived by their daughter Valentina, who married in 1389 Louis I, Duke of Orléans, brother of Charles VI, King of France. The three sons of Gian Galeazzo and Isabelle died before reaching adulthood.