Simplify the following text for a Grade 4 native English-speaking person.
Original: After a period of ill health , exacerbated by his exhausting work on commissions for murals to decorate the Churches of Saint-Roch and Saint-Philippe-du-Roule , ChassÃ riau died at the age of 37 in Paris , on October 8 , 1856 .
Simplified: ChassÃ riau died when he was 37 years old in Paris , on October 8 1856 .