Alghero is a town on the northwest coast of Sardinia, Italy. Surrounded by ancient fortifications, it is famous for its old centre with cobbled streets. It has several buildings with Catalan Gothic architecture, including the Cattedrale di Santa Maria with its imposing bell tower, the Palazzo Guillot and the Chiesa di San Francesco, a 14th century church. The nearby Chiesa di San Michele has a colourful tiled dome. The Museo del Corallo di Alghero has exhibitions of red corals.