Simplify the following text for a Grade 11 native English-speaking person.
Original: Since its launch in 1998 , the site has provided information on all four physical Tate galleries ( Tate Britain , Tate St Ives , Tate Liverpool and Tate Modern ) under the same domain .
Simplified: Since its launch in 1998 , the site has had information on all four Tate galleries ( Tate Britain , Tate St Ives , Tate Liverpool and Tate Modern ) in the same website .