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A fragment of the Pisan city walls.
© OpenStreetMap contributors
Now the City Hall.
The Cathedral of St. Nicholas of Bari
The cathedral was built in the 13th century and enlarged in Catalan Gothic style from 1480; there's a monument to the Duca di Moriana inside. The façade, belonging to the Baroque Spanish colonial restorations of 1650–1723, has a rectangular portico surmounted by three niches housing statues of saints. The bell tower is in Romanesque style.