The State Hermitage Museum () in Saint Petersburg, Russia is one of the largest museums in the world, with 3 million works of art (not all on display at once), and one of the oldest art galleries and museums of human history and culture in the world. The vast Hermitage collections are displayed in six buildings, the main one being the Winter Palace which used to be the official residence of the Russian Tsars. International branches of The Hermitage Museum are located in Amsterdam, London, Las Vegas and Ferrara (Italy). The Hermitage holds the Guinness World Record as having the world's largest collection of paintings.

Strong points of the Hermitage collection of Western art include Michelangelo, Leonardo da Vinci, Rubens, van Dyck, Rembrandt, Poussin, Claude Lorrain, Watteau, Tiepolo, Canaletto, Canova, Rodin, Monet, Pissarro, Renoir, Cézanne, van Gogh, Gauguin, Picasso, and Matisse. There are several more collections, however, including the Russian imperial regalia, an assortment of Fabergé jewellery, and the largest existing collection of ancient gold from Eastern Europe and Western Asia.
Source: http://en.wikipedia.org/w/index.php?title=Hermitage+Museum