It now seemed certain that Francis would in due course ascend the throne; but Louis XII. abruptly contracted a third alliance, marrying Mary of England, the sister of Henry VIII. Louise of Savoy soon deemed it prudent to keep a watch on the conduct of this gay young Queen, and took up her residence at the Court in November 1514. Shortly afterwards Louis XII. died of exhaustion, as many had foreseen, and the hopes of the Duchess of Angoulême were realised. She knew the full extent of her empire over her son, now Francis I., and felt both able and ready to exercise a like authority over the affairs of his kingdom. The accession of Francis gave a more important position to Margaret and her husband. The latter was already one of the leading personages of the state, and new favours increased his power. He did not address the King as “Your Majesty,” says Odolant Desnos, but styled him “Monseigneur” or “My Lord,” and all the acts which he issued respecting his duchy of Alençon began with the preamble, “Charles, by the grace of God.” Francis had scarcely become King than he turned his eyes upon Italy, and appointing his mother as Regent, he set out with a large army, a portion of which was commanded by the Duke of Alençon. At the battle of Marignano the troops of the latter formed the rearguard, and, on perceiving that the Swiss were preparing to surround the bulk of the French army, Charles marched against them, overthrew them, and by his skilful manouvres decided the issue of the second day’s fight. (1) The conquest of the duchy of Milan was the result of this victory, and peace supervening, the Duke of Alençon returned to France. 1 Odolant Desnos’s _Mémoires historiques sur Alençon_, vol. ii. p. 238. It was at this period that Margaret began to keep a Court, which, according to Odolant Desnos, rivalled that of her brother. We know that in 1517 she and her husband entertained the King with a series of magnificent fêtes at their Château of Alençon, which then combined both a palace and a fortress. But little of the château now remains, as, after the damage done to it during the religious wars between 1561 and 1572, it was partially demolished by Henry IV. when he and Biron captured it in 1590. Still the lofty keep built by Henry I. of England subsisted intact till in 1715 it was damaged by fire, and finally in 1787 razed to the ground.