Tate Modern is a modern art gallery located in London. It is Britain's national gallery of international modern art and forms part of the Tate group (together with Tate Britain, Tate Liverpool, Tate St Ives and Tate Online). It is the most-visited modern art gallery in the world, with around 4.7 million visitors per year. It is based in the former Bankside Power Station, in the Bankside area of the London Borough of Southwark. Tate holds the national collection of British art from 1500 to the present day and international modern and contemporary art.