Simplify the following text for a Grade 6 native English-speaking person.
Original: Comte died in Paris on 5 September 1857 from stomach cancer and was buried in the famous CimetiÃ re du PÃ re Lachaise , surrounded by cenotaphs in memory of his mother , Rosalie Boyer , and of Caroline de Vaux .
Simplified: He died in Paris on September 5th , 1857 and is buried at the famous CimetiÃ re du PÃ re Lachaise .