Simplify the following text for a Grade 5 native English-speaking person.
Original: Pope Leo X ( 11 December 1475 â `` 1 December 1521 ) , born Giovanni di Lorenzo de ' Medici , was the Pope from 1513 to his death in 1521 .
Simplified: Pope Leo X was born 11 December 1475 and died 1 December 1521 .