Louvre, in full Louvre Museum or French Musée du Louvre, official name Great Louvre or French Grand Louvre, national museum and art gallery of France, housed in part of a large palace in Paris that was built on the right-bank site of the 12th-century fortress of Philip Augustus. It is the world’s most-visited art museum, with a collection that spans work from ancient civilizations to the mid-19th century.