The Museo Diocesano is a free museum situated in the heart of Catania. It is housed in the former Benedictine Monastery of San Nicolò l'Arena, which dates back to the 16th century. The museum displays a rich collection of religious art and artifacts, including paintings, sculptures, and religious objects from different periods. Visitors can admire masterpieces by renowned artists such as Antonello da Messina and Giovanni Tuccari. The museum also offers guided tours and educational programs for visitors of all ages.