Simplify the following text for a Grade 7 native English-speaking person.
Original: The original gallery is now called Tate Britain and is the national gallery for British art from 1500 to the present day , as well as some modern British art .
Simplified: The gallery was started in 1897 , as the National Gallery of British Art . When its role was changed to include Modern Art it was renamed the Tate Gallery after Henry Tate .