Plutarch, Pomp.  52   (ca. A.D. 100):


Crassus went out to his province at the end of his year of office as consul. Pompeius, however, stayed behind to open his theater, at the dedication of which he held athletic sports and musical contests and provided wild animals in which 500 lions were killed. The most remarkable show of all—indeed a most horrifying spectacle—was an elephant fight.