When Joe Weider created the Mr. Olympia in 1965, he envisioned that his show would become the biggest in bodybuilding, but he may not have even understood how massive his creation would become.

The Olympia has become a force all its own in sports, and one reason why is the athletes themselves. The Olympia stage has been the platform for many of bodybuilding’s greatest rivalries, and their face-offs have only added to the show’s significance. These ten rivalries, listed in chronological order, show exactly why the 60th Olympia at Resorts World in Las Vegas, NV, on Oct. 11-12, will be a destination for thousands and have the attention of millions around the world.