his relations with Cardinal Giuliano after the War of the Barons. He also warned King Ferdinand and Queen Isabella of Spain that Alexander was intriguing with the French, which brought an immediate visit of a Spanish ambassador to the Pope. In June Federico of Altamura was back in Rome and held conversations with Della Rovere, assuring him of Neapolitan protection. On 24 July 1493, Cardinal della Rovere returned to Rome (despite the warnings of Virginius Orsini) and dined with the Pope. Charles VIII and the French war over Naples Della Rovere at once determined to take refuge from Borgia's wrath at Ostia. On 23 April 1494, the Cardinal took ship, having placed his fortress at Ostia in the hands of his brother Giovanni della Rovere, and traveled to Genoa and then to Avignon. He was summoned by King Charles VIII to Lyons, where the two met on 1 June 1494. He joined Charles VIII of France who undertook to take Italy back from the Borgias by military force. The King entered Rome with his army on 31 December 1495, with Giuliano della Rovere riding on one side and Cardinal Ascanio Sforza riding on the other. The King made several demands of Pope Alexander, one of which was that the Castel Sant'Angelo be turned over to French forces. This Pope Alexander refused to do, claiming that Cardinal della Rovere would occupy it and become master of Rome. Charles soon conquered Naples, making his triumphal entry on 22 February 1495, but he was forced to remove most of his army. As he was returning to the north, his army was defeated at the Battle of Foronovo on 5 July 1495, and his Italian adventure came to an end. The last remnants of the French invasion were gone by November 1496. Ostia, however, remained in French hands until March 1497, causing difficulties in the provisioning of the city of Rome. Back in Lyon in 1496, Charles VIII and Giuliano della Rovere were planning another war. Giuliano was traveling back and forth from Lyon to Avignon, raising troops. It was being reported in France by June 1496, moreover, that King Charles intended to have a papal election in France and to have Cardinal della Rovere elected pope. In March 1497 Pope Alexander deprived Cardinal della Rovere of his benefices as an enemy of the Apostolic See, and Giovanni della Rovere of the Prefecture of