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In page Dacians:

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The Roman people hailed Trajan's triumph in Dacia with the longest and most expensive celebration in their history, financed by a part of the gold taken from the Dacians.[citation needed] For his triumph, Trajan gave a 123-day festival (ludi) of celebration, in which approximately 11,000 animals were slaughtered and 11,000 gladiators fought in combats. This surpassed Emperor Titus's celebration in AD 70, when a 100-day festival included 3,000 gladiators and 5,000 to 9,000 wild animals.[3]