Heritage Malta will be opening seven sites for free next Monday, which is a public holiday. The sites in Malta are Għar Dalam in Birżebbuġa, the Inquisitor's Palace in Vittoriosa the National Museum of Fine Arts in South Street, Valletta. As an added attraction, a group of artists will interprete works by Mattia Preti at the Museum of Fine Arts. A live model will help to reenact the pose in paintings by Preti. In Gozo one will be able to call at the Museum of Archaeology, the Folklore Museum, the Old Prisons and the Nature Museum at the Cittadella in Victoria. At the Heritage Malta offices, also in Victoria, one will be able to view the Willie Apap exhibition. The opening hours of all these sites will be 9 a.m. to 5 p.m.