King Ferdinand decided to promote the possibility of marriage between Frederick and the daughter of Charles the Bold and sought any opportunity that would require the Duke of Burgundy to accept the offer. On November 26, 1474 in Foggia, Ferdinand gave Francesco Bertini, Bishop of Capaccio, as ambassador to the court of Burgundy, full powers to conduct the negotiations. On November 28, Alphonse, Duke of Calabria, was confirmed as an ambassador for the negotiations by his father and his brother the bishop of Capaccio.