Simplify the following text for a Grade 10 native English-speaking person.
Original: DuprÃ became famous for performing more than 2000 organ recitals throughout Australia , the United States , Canada and Europe , which included a recital series of 10 concerts of the complete works of Johann Sebastian Bach in 1920 ( Paris Conservatoire ) and 1921 ( Palais du TrocadÃ ro ) , both performed entirely from memory .
Simplified: DuprÃ became famous for performing more than 2,000 organ recitals in Europe , the United States , Canada and Australia . In 1920 he gave a series of concerts in the Paris Conservatoire in which he played all the organ works by Johann Sebastian Bach from memory .