Located on the left (south) bank of the Seine, the Montparnasse neighbourhood stands out for its Montparnasse Tower, a skyscraper with a station and cinemas at its base. However, in the early 20th century, the district was an artistic and intellectual centre in Paris. One of its restaurant-bars, the Closerie des Lilas, was a meeting place for writers Gide and Apollinaire. Many famous people are buried in Montparnasse Cemetery, such as Jean-Paul Sartre, Simone de Beauvoir and Serge Gainsbourg. A little further on is the imposing Paris Observatory, built in 1667.