​As well as baths a gymnasium was also built near the theater.
A place for physical and mental exercise the gymnasiums of antiquity could also be considered an educational establishments school of sorts. 
It is believed training for the theater was given here.
Sporting shows and events to small to be held at the stadium were probably held at the Gymnasium.
The Gymnasium also known as the Palaestra took the form of a tribune, most probably with a pool or large water basin dominating the central space.
the narrow cubicles on the outer perimeters served as changing rooms.
A long large U shaped unit was built by these spaces as a passage way and as area of repose and relaxation.
The milestones that served as the road signs of antiquity, informing travelers of the distances between destinations. 
The unit if measurement  employed was the stadia and was equivalent to 185 meters.
When a new emperor was crowned the stones were turned over and used a fresh for the sake of economy. Few of these stones have survived to the present day.