An extensive, in the 2nd century BC. The gymnasium built in BC was located on the southern slope of the Acropolis. The main entrance to the gymnasium was on the southeast corner of the lower of the three terraces of the facility. The small south-facing terrace had almost no structural facilities and is referred to as a boys' gymnastic session. The middle terrace was around 250 meters long and in its central area around 70 meters deep. A two-story hall stood on its north side. To the east of the square rose a small Corinthian prostyle temple. At the transition from the middle to the upper gymnasium terrace was a covered stadium, the so-called "basement stadium".
The upper terrace, which is also the largest at 150 × 70 meters, was a courtyard surrounded by columned halls and other buildings, which alone measured around 36 meters × 74 meters. This complex, which can be addressed as a palaestra, had a theater-like classroom, probably from the Roman period, behind its northern portico, and a large ballroom in the middle. Other rooms of unclear function were accessible from the portico. In the west there was an Ionic temple facing south as the central sanctuary of the grammar school. The eastern area was built over by a thermal bath in Roman times. More Roman baths were built west of the Ionic temple.
Source: Wikipedia