The military amphitheater located south of former Roman military camp. Around 145 the training ground, rebuilt in stone amphitheater during the reign of emperor Antoninus Pius. The construction work was performed by the Legio II Adiutrix technical corps. The longitudinal axis , cross axis of the outer walls of the stand. The arena size of ×. Molded walls of its cabinets were built by fishbone vaults. The walls were huge stone pillar supported.

The Aquincum Military Amphitheatre is the greater of two amphitheatres in Budapest, Hungary, the other being the Aquincum Civil Amphitheatre. It is located in the Obuda district, just north near the Danube river. It was built around 145, during the reign of emperor Antoninus Pius.