Simplify the following text for a Grade 8 native English-speaking person.
Original: During the French Revolution , not only was the city renamed `` Franciade '' from 1793 to 1803 , but the royal necropolis was looted and destroyed .
Simplified: During the French Revolution in 1793 , the city was renamed Franciade , and the royal necropolis was looted and destroyed . The name was changed back in 1803 .