Florence - Skyline seen from Belltower
Florence picture - In the 13th century the pro-papal Guelphs and pro-imperial Ghibellines started a century-long bout of bickering, which wound up with the Guelphs forming their own government in the 1250s. By 1292 Florence nobles were excluded from government. The city became increasingly democratised, eventually becoming a commercial republic controlled by the Guelph-heavy merchant class.