in baroque style in 1712. The marble campanile attributed to Leon Battista Alberti was initiated in 1412 but is still incomplete, missing one projected additional storey and a dome, as it can be observed from numerous historical prints and paintings on the subject. Near the cathedral and the castle also lies the 15th-century city hall, that served as an earlier residence of the Este family, featuring a grandiose marble flight of stairs and two ancient bronze statues of Niccolò III and Borso of Este. The southern district is the town's oldest, crossed by a myriad of narrow alleys that date back to the Early Middle Ages. is perhaps the best preserved Medieval building in Ferrara. It was the private residence of merchant Giovanni Romei, related by marriage to the Este family, and likely the work of the court architect Pietrobono Brasavola. Thanks to the nuns of the Corpus Domini order, much of the original decorations in the inner rooms have been saved. The house features fresco cycles in the "Sala delle Sibille" ("room of sibyls"), an original terracotta fireplace bearing the coat of arms of Giovanni Romei in the adjoining Saletta dei Profeti ("room of the prophets"), depicting allegories from the Bible, and in other rooms, some of which were commissioned by cardinal Ippolito d'Este, paintings by the school of Camillo and Cesare Filippi (16th century). Palazzo Schifanoia ("sans souci") was built in 1385 for Alberto V d'Este. The palazzo includes frescoes depicting the life of Borso d'Este, the signs of the zodiac and allegorical representations of the months. The vestibule was decorated with stucco mouldings by . The building also contains fine choir-books with miniatures and a collection of coins and Renaissance medals. The Renaissance Palazzo Paradiso, part of the Ferrara University library system, displays part of the manuscript of Orlando furioso and letters by Tasso as well as Ludovico Ariosto's grave. Its famous alumni include Nicolaus Copernicus and Paracelsus. The northern quarter, which was added by Ercole I in 1492–1505 thanks to the master plan of Biagio Rossetti, and hence called the Addizione Erculea, features a number of Renaissance palazzi. Among the finest is Palazzo dei Diamanti (Diamond Palace), named after the diamond points into which the façade's stone blocks are cut. The palazzo houses the National Picture Gallery, with a large collection of the school of Ferrara, which first rose to prominence in the latter half of