Alghero is a city on the north-west coast of Sardinia, in Italy. Surrounded by ancient walls, it is known for its historic paved center. Its Gothic Catalan buildings include the Cathedral of Santa Maria, with an impressive bell tower, the Guillot Palace and the 14th century Church of San Francesco. The nearby Church of San Michele boasts a colorful dome decorated with tiles. The Coral Museum of Alghero exhibits red corals.