Ferrara is a city located in Emilia-Romagna. It is known for the buildings erected in the Renaissance by the Este, lords of the city, including the Estense Castle, from the luxurious rooms, the Palazzo dei Diamanti, seat of the National Gallery of Ferrara and characterized by the façade covered in diamond-shaped marble blocks. and finally the Cathedral of Ferrara, with a Romanesque facade with three cusps and a marble bell tower.