1441 – Torre de Quart, Valencia, Spain

The Quart Towers were a part of this old Christian city wall build in the 14th century but the towers are from the 15th century. The exterior of the monument still shows signs of the bombardments suffered during France’s siege of the city in 1808. The building has been used through the centuries for different purposes, from a womans prison to a military prison. Externally, they are two cylindrical towers with flat rear walls and they are a good example of military construction from the late gothic period.