The most successful car owner is Roger Penske, owner of Team Penske, which has 16 total wins and 17 poles.The Indianapolis 500 is held annually at the Indianapolis Motor Speedway, a 2.5-mile oval circuit.In the 1970s-1990s, Indianapolis was often the second or third race of the season, and as late as the 1950s, it was sometimes the first championship event of the year.Due to the high prestige of the Indianapolis 500 - rivaling or even surpassing the season championship - it is not uncommon for teams and drivers to concentrate heavily on preparation for the 500 during the early part of the season, and not focus fully on the championship battle until after Indy.
The first "500" was held at the Speedway on Decoration Day (as Memorial Day was known from its inception in 1868 to 1967 when Federal Law made Memorial Day the official name), May 30, 1911, was declared the winner, although Ralph Mulford protested the official result.
It has been avouched to be the largest single-day sporting event in the entire world.
Likewise, the Indianapolis Motor Speedway itself is regarded as the world's largest sporting facility in terms of capacity.
That is unique to most sports where major events are usually at the end of the respective season.
Currently the Indy 500 is the sixth event of the 17-race Indy Car schedule.