Simplify the following text for a Grade 10 native English-speaking person.
Original: Aeschylus 's work was so respected by the Athenians , that after his death his were the only tragedies allowed to be restaged in subsequent competitions .
Simplified: Aeschylus ' work was so respected by the Athenians that after his death , his were the only tragedies allowed to be restaged in future competitions .