GPR investigation of “Fortezza da Basso” (Lower Fortress) in Florence, Italy

The “Fortezza da Basso” (Lower Fortress) is one of the most significant monument in Florence, Italy. Currently is a prestigious facility for exhibitions and international events. The municipal government intends to built new pavilions, but the Superintendency office of monuments and cultural heritage required a critical critical historic and architectonic study including a GPR survey. In this paper the authors report the results of a GPR measurement campaign carried out with this aim. In particular at “Cavaniglia” bastion the buried structures of the ruined tower have been mapped and a possible arched structure, previously not known, has been detected in the underground.