Equirria
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The Equirria were two ancient Roman festivals of chariot racing, or perhaps horseback racing, held in honor of the god Mars, one 27 February and the other 14 March.
Denarius depicting the helmeted head of Mars, with Victory driving a biga on the reverse (issued 88 BC by Gnaeus Cornelius Lentulus Clodianus)
Lusus Troiae
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The Lusus Troiae, also as Ludus Troiae and ludicrum Troiae was an equestrian event held in ancient Rome. It was among the ludi ("games"), celebrated at imperial funerals, temple foundings, or in honor of a military victory. The lusus was occasionally presented at the Saecular Games, but was not attached regularly to a particular religious festival.
Panel from the Gundestrup Cauldron sometimes interpreted as depicting an equestrian ritual of initiation
Drawing of an Etruscan oinochoë with a legend reading Truia, sometimes thought to depict the Troy Game
Detail of foot soldiers from the opposite side of the Truia wine-server