Città di Castello is presented as an Italian town whose fortifications became a test case for the political value of defensive architecture. Its significance lies in the contrast between the customary belief that fortresses protect a ruler and the more conditional judgment that security may sometimes require their destruction.

Fortresses and Political Security

Città di Castello enters the argument through the actions of Messer Niccolo Vitelli. Princes commonly built fortresses to restrain subjects plotting against them and to provide refuge during a sudden attack. Against this general practice, Niccolo Vitelli considered the particular circumstances of Città di Castello and decided that two fortresses should be dismantled in order to secure the town.

The example makes fortresses instruments of political calculation rather than universally reliable safeguards. A fortress can strengthen a ruler against hostile inhabitants, but it can also preserve a structure that makes the town vulnerable to renewed resistance or separates the ruler from the people whose allegiance determines lasting control. The dismantling of the two fortresses therefore represents a deliberate exchange of fixed military protection for a different conception of security.

Comparative Examples

Città di Castello is paired with the experience of Guido Ubaldo, Duke of Urbino. After being driven from his dominions by Cesare Borgia, Guido Ubaldo razed the fortresses throughout the Dukedom, believing that their removal would prevent the territory from being lost so easily again. The Bentivogli followed a similar policy upon returning to Bologna. These cases place Città di Castello within a broader pattern in which rulers judged that fortifications could become liabilities when political conditions changed.

The comparison also qualifies any simple opposition between building and demolishing fortresses. The usefulness of a fortress depends on whether a Prince fears his subjects more than foreign enemies. A ruler threatened chiefly by internal hostility may find a fortress valuable as a curb and refuge; one more exposed to strangers than to his own people may have reason to leave fortresses alone. Città di Castello illustrates the second kind of calculation only indirectly, through the decision to remove defensive structures rather than preserve them automatically.

Security Beyond Walls

The wider argument places Città di Castello beside a more fundamental principle: the best fortress is the absence of hatred among subjects. No fortress can save a ruler once the people take up arms, because foreign powers will be ready to assist them. Defensive walls may delay an attack, but they cannot repair the political breach that gives an enemy an invitation to enter.

This principle distinguishes physical defense from durable authority. Fortresses operate through masonry, weapons, and delay; political security depends on the relationship between a ruler and the inhabitants of the State. Città di Castello is memorable precisely because its example shows that dismantling fortresses may be a rational response when fortifications threaten that relationship instead of protecting it.

Place in the Book's Political Geography

Elsewhere, the discussion of acquired States emphasizes the importance of local conditions. Territories joined to an ancient dominion are easier to retain when their language, customs, and laws resemble those of the conqueror's people, while provinces differing in language and laws require closer supervision, residence, colonies, and control of neighboring powers. Città di Castello is not examined in those terms, but its appearance in the fortress argument follows the same spatial logic: political structures must be judged according to the specific configuration of a town and its population, not according to a universal rule.

The town consequently functions less as a fully narrated setting than as a sharply chosen political example. Its two dismantled fortresses condense the book's larger insistence that rulers must anticipate disorder, distinguish external from internal threats, and treat military architecture as subordinate to the broader task of securing power. Città di Castello's role is brief but decisive: it demonstrates that a wall can be a protection in one circumstance and a danger in another.