Before the Games themselves, heralds went around the city and invite the people to "a spectacle, such as they had never witnessed and never would again" [REF].
The key roles were played by Augustus and his son-in-law Marcus Vipsanius Agrippa, in their capacity as members of the quindecimviri; Augustus participated alone in the night-time sacrifices but was joined by Agrippa for those during the day.