The history of the town is closely linked to the events of the family of the Guidi counts, who dominated it from 1191 until 1440 when it became the seat of the vicar of the Republic of Florence. The family of the Guidi counts was responsible for the structure of the current medieval village was in fact the Count Simone da Battifolle, that in 1200 began the transformation of the castle keep into a stately residence of the city and in 1261 built the current circle of walls with the five doors of access to the country now reduced to four. In the castle of Poppi stayed in 1307 and then in 1311 Dante Alighieri and tradition says that in Poppi the great poet composed the XXXIII canto dell’Inferno. Today in the halls of the castle are hosted numerous exhibitions of works of art and conferences and musical performances are held. Walking along the city walls that still today largely surrounds the town is known as this was built with a unique “L” shape whose poles of urban layout are on one side the castle of the Guidi counts and the other the Abbey of San Fedele.