Introduction to the Musée d'Orsay: The Musée d'Orsay is located on the left bank of the Seine River in Paris, France, across the river from the Louvre. It was once known as "the most beautiful museum in Europe" and is one of the three largest museums in Paris today. One of the treasure troves of art. The Musée d'Orsay mainly collects Impressionist paintings of the 19th and 20th centuries, and works such as Renoir's Garrett Moulin Ball, Van Gogh's Self-Portrait, and Monet's Blue Water Lilies are among the treasures of the museum.