The term London's ___ Modern (Art Gallery) is solved by the four-letter word 'Tate'. The Tate is a family of art galleries in London, England. It consists of four galleries: Tate Britain, Tate Modern, Tate Liverpool, and Tate St Ives. The Tate Modern is the most visited modern art gallery in the world, and it is located on the south bank of the River Thames. It houses a collection of international modern and contemporary art from 1900 to the present day.