Simplify the following text for a Grade 9 native English-speaking person.
Original: When Pope Julius died in 1513 , the next pope , Leo X , called in three architects , Giuliano da Sangallo , Fra Giocondo and Raphael .
Simplified: When Pope Julius died in 1513 , Bramante was replaced with Giuliano da Sangallo , Fra Giocondo and Raphael .