One of the biggest festivals in Sardinia is L’ardia Di San Costantino, commemorating Constantine’s victory over Maxentious at the Mulvian Bridge in 312, where Constantine is reported to have seen a flaming cross inscribed with the words “in this sign thou shall conquer”. Every year on July 5th through 7th, Constantine’s charge is recreated with a monumental horse race held on the grounds of the Sanctuario DI San Costantino, just outside Sedilo’s eastern boundary.