Fortresses of Lucignano

Lucignano is one of Tuscany's best-preserved walled towns, famous for its medieval layout of concentric ellipses — a nearly intact design that sets it apart from every other borgo in the region. At the center of that layout stands the Cassero, the fortress built by Sienese craftsmen from 1300, when Lucignano was under Siena's rule and the fortress served a purely military function.

The town's walls, with their three gates, were raised by the Sienese in 1371. Lucignano's strategic position on the route between Siena and Arezzo made it the site of near-constant conflict between 1200 and 1500, drawing in Florence and Perugia as well — a crossroads fought over by Tuscany's leading medieval powers.

After Siena's defeat by Florence, the Cassero lost its defensive function and was converted first into a grain store, then in 1829 into a small theatre — a transformation typical of Tuscan fortresses that outlived the era of communal conflict by reinventing themselves as civic spaces.

The tour available today is not a traditional guided visit to the Cassero's interior, but a 12km guided countryside hike through the Valdichiana, departing from the La Lappola estate, passing the fortress walls, and continuing to the Sanctuary of the Madonna della Querce — an experience focused as much on the region's landscape and nature as on the Cassero's military history.

The fortress's conversion from military stronghold to grain store to theatre traces a specific arc common to Tuscan communal-era fortifications once Siena's regional power collapsed, giving Lucignano's Cassero a layered civic history beneath its original defensive purpose.

The elliptical town plan surrounding the Cassero, virtually unchanged since the medieval period, gives Lucignano an unusually legible historic urban form, best appreciated from the vantage points the hike passes along the way.