Bastione Fortezza, Star fort bastion in Grosseto, Italy

Bastione Fortezza is a star-shaped fortress in Grosseto with a pentagonal design and two inner bastions pointing toward the city center. The restored site now houses exhibition spaces accessed through a main gate with a historic drawbridge.

Built in the second half of the 16th century during the reconstruction of Grosseto's walls, the pentagonal bastion contains two secondary bastions facing the historic centre: the Vittoria and Santa Lucia bastions, the latter bordering the Cassero Senese. From the mid-19th century until the Second World War the whole section, called the Citadel, housed the Military District. A recent restoration turned it into a cultural and exhibition centre.

The citadel section of the walls was called "Cittadella" and housed the Military District from the mid-19th century until the Second World War. After restoration the whole area became a cultural and exhibition centre hosting numerous events. Inside, a staircase from the gate leads left to the Cassero Senese and right to the Piazza d'Armi, overlooked by the Chapel of Santa Barbara.

Access to the citadel is through a gate beside the Santa Lucia bastion, preceded by a drawbridge. Beyond the gate, a staircase leads left to the Cassero Senese and right to the Piazza d'Armi, where the Chapel of Santa Barbara stands. The restored area now serves as a cultural and exhibition centre.

The fortress was the military district headquarters from the mid-19th century until the end of World War II, when the whole section was still called the "Cittadella". A restoration has since turned the former barracks area into a cultural and exhibition centre.