Simplify the following text for a Grade 6 native English-speaking person.
Original: He established so great a reputation that he was summoned to Paris from 1660 ( he revived his opera Xerxes ) until 1662 , producing his Ercole amante .
Simplified: Cavalli became so famous that he was invited to Paris in 1660 where he performed his opera Xerxes . He visited Paris again in 1662 .