Complex sentence: 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".
Split into simpler sentences: He established so great a reputation that he was summoned to Paris in 1660 where he revived his opera "Xerxes". He visited Paris again in 1662, producing his "Ercole amante".