Simplify the following text for a Grade 3 native English-speaking person.
Original: In the 17th century the chapel had its own building in Whitehall , which burned down in 1698 ; since 1702 it has been based at St James 's Palace .
Simplified: In the 17th century the chapel had its own building in Whitehall , which burned down in 1698 . Since 1702 it has been based in St. James 's Palace .