Final answer:
The international sporting event held in the summer in Rome, Italy was the Olympic Games.
Step-by-step explanation:
The international sporting event held in the summer in Rome, Italy was the Olympic Games. The Olympic Games were the most renowned athletic contests in ancient Greece and attracted contestants from all over the Greek world, including Sicily and southern Italy. These games were held at the sanctuary in Olympia, dedicated to Zeus. The purpose of the games was to honor the gods, promote friendly competition, and showcase strength and endurance.