two fortresses in Citta di Castello so that he might keep that state; Guido Ubaldo, Duke of Urbino, on returning to his dominion, whence he had been driven by Cesare Borgia, rased to the foundations all the fortresses in that province, and considered that without them it would be more difficult to lose it; the Bentivogli returning to Bologna came to a similar decision. Fortresses, therefore, are useful or not according to circumstances; if they do you good in one way they injure you in another. And this question can be reasoned thus: the prince who has more to fear from the people than from foreigners ought to build fortresses, but he who has more to fear from foreigners than from the people ought to leave them alone. The castle of Milan, built by Francesco Sforza, has made, and will make, more trouble for the house of Sforza than any other disorder in the state. For this reason the best possible fortress is—not to be hated by the people, because, although you may hold the fortresses, yet they will not save you if the people hate you, for there will never be wanting foreigners to assist a people who have taken arms against you. It has not been seen in our times that such fortresses have been of use to any prince, unless to the Countess of Forli, when the Count Girolamo, her consort, was killed; for by that means she was able to withstand the popular attack
