One of the most overlooked and yet fascinating galleries in London is the National Portrait Gallery. If you’re interested in British history or would like to check up on 20th century faces, the National Portrait Gallery is a great destination. Often overlooked, it sits behind the National Gallery but has a completely separate identity. The National Portrait Gallery holds around 200,000 portraits of people from diverse backgrounds who have all been chosen for their great achievements or aristocratic connections. See some of the most famous people of the last 500 years of British history.