The 盧浮宮, or Louvre, is one of the world's largest and most famous art museums, located in Paris, France. Originally built as a fortress in the late 12th century, it became a royal palace before being transformed into a public museum during the French Revolution. The museum houses an extensive collection of art, including works from ancient civilizations to the 19th century. Among its most renowned pieces is the Mona Lisa, painted by Leonardo da Vinci, which attracts millions of visitors each year. The Louvre is also known for its iconic glass pyramid entrance, designed by architect I. M. Pei, which was completed in 1989.