To paraphrase the late John Paul II, the Church needs art to better understand what lies inside the soul of man, and Tarnów’s superb Diocesan Museum, established in 1888, does a very good job at doing just that. An astonishing collection of religious art from the 15th century onwards, housed inside an equally wonderful ensemble of 16th-century houses, the museum's most precious artefact is the original altar from St. Leonard's Church in nearby Lipnica Murowana, moved here for preservation reasons at the insistence of UNESCO. Other highlights include some truly breathtaking Gothic triptychs and sculptures from Małopolska, a collection of church fabrics from the Middle Ages, some 19th-century religious folk art, and an exhibit of coins and medals featuring JPII. If you're a fan of sacral art, this is a truly marvellous museum.