Giant Gladiator School Found in Austria

This giant structure is the now-rivaling structure of the training grounds near the Colosseum in Rome. Being extensive and as big as two Walmart (almost as big as Meadowhall in England) This was certainly an excessive feat. This gladiator school had:

1. Central courtyard
2. Small rooms
3. Giant underfloor heating rooms
4. Mini-amphitheater
5. Spectator bleaches
6. Massive walled campus
7. Combat horse training

They found this site using a 3D radar, which gave them a clear picture of what it looked like.