AS Lu, Direzione poi Commissariato delle Acque e Strade 717, n. 205

The two oldest bastions

The 16th-century Curtain Wall is today interspersed with eleven bastions that differ in shape and size and are irregularly distributed along the Walls: denser in the southern area, more spaced out in the northern area, witnessing the complex 150-year building process of the Walls. This plan of the Walls was drawn by engineer Alessandro Resta on February 28, 1569, and shows the interventions that had already been carried out to the north and south. 

To the north, there is the 'Platform', the oldest bastion, named after San Frediano, which can be distinguished by its small size. The platform is slightly protruding from the line of the Walls and is grafted on the medieval walls still clearly identifiable because it is made of stone. To the south, Santa Maria bastion, the only one of the Renaissance bastions with 'a musone' (i.e. squared) flanks, was designed and built by Alessandro Resta together with the two adjacent Curtain Walls and San Pietro gate.

Veduta della piattaforma San Frediano e del Muro medievale in pietra