Pedzisa mutsara unotevera: Pisa, iyo panguva iyoyo yaiva pedyo negungwa pamuromo peRwizi rwaArno, yakawana mbiri yayo huru pakati pezana remakore rechi12 nerechi13, apo ngarava dzayo dzaidzora Western Mediterranean. Rwisano pakati pePisa neGenoa yakakura zvikuru muzana ramakore rechi 12 uye yakaguma nehondo dzomugungwa
Hondo yeMeloria (1284), iyo yakaratidza kutanga kwekuderera kwePisan; Pisa akaramba zvese zvaaiti Corsica uye akasiya chikamu cheSardinia kuGenoa muna 1299. Uyezve, kukunda kweAragonese kweSardinia, uko kwakatanga muna 1324, kwakatorera guta reTuscan simba pamusoro pe"Giudicati" yeCagliari neGallura. Pisa yakaramba yakazvimiririra uye ichidzora mhenderekedzo yeTuscan kusvikira muna 1409, apo yakabatanidzwa neFlorence.