In modern times, Saint Petersburg is considered the Northern Capital and serves as a home to some federal government bodies such as the Constitutional Court of Russia and Heraldic Council of the President of the Russian Federation. It is also a seat for National Library of Russia and a planned location for the Supreme Court of the Russian Federation. The Historic Centre of Saint Petersburg and Related Groups of Monuments constitute a UNESCO World Heritage Site, so it's also referred to as Russia's Culture Capital. Saint Petersburg is home to the Hermitage, one of the largest art museums in the world.