Castel, Sismondo located in Rimini, once belonged to the powerful ruler of this city Sigismund Pandolfo Malatesta. Its construction began in March 1437 year. According to historical Chronicles, Malatesta himself designed the castle, although this was attended by some real architects such as Filippo Brunelleschi. Work on the construction of the castle lasted about 15 years.

Initially, Castel Sismondo was surrounded by a wide moat with the Ravelin at the main entrance where you could see the heraldic symbol of the Malatesta family and the Gothic inscription "Sigismondo Pandolfo". The strong walls of the castle, according to historians, were able to withstand the impact of a new firearm, just in those years, widely spread throughout Europe. All the towers were turned in the direction of Rimini, because in the middle of the 15th century the castle was situated outside the city walls. This feature suggests that, most likely, a popular uprising against the Malatesta were not uncommon, and the mighty Lord had to defend it from residents. Once each of these square towers was equipped with bronze cannon.

The Central part of the Castel Sismondo, which consisted of several buildings, was the residence of the Malatesta. Most beautiful living rooms were decorated with tapestries, murals and hangings. Probably were decorated as the exterior walls of the residence, as evidenced by the traces of majolica, which survived until our days. It was in this castle in 1468, the year Sigismondo Pandolfo Malatesta and died. In 1821, the year the castle was converted into military barracks for the local branch of the carabinieri. Five years later, its external walls were demolished and the moat was filled with earth. Today preserved in the Central "core" of Castel Sismondo variety of cultural activities.