Simplify the following text for a Grade 8 native English-speaking person.
Original: The 1960 Summer Olympics , officially known as the Games of the XVII Olympiad , was an international multi-sport event held from August 25 to September 11 , 1960 in Rome , Italy .
Simplified: The 1960 Summer Olympics , officially known as the Games of the XVII Olympiad , were held in 1960 in Rome , Italy .