The Ludus Dacicus or The Dacian Gladiatorial Training School was one of the four gladiator training schools (ludi) in Ancient Rome. It was founded by Domitian (r. 81–96), completed by Trajan (r. 98–117), and was used to train gladiators drawn from among the Dacian prisoners taken by both emperors in their Dacian Wars. It was located east of the Colosseum, on the slopes of the Caelian Hill.[1]