The stadium was built during the Hellenistic age (2nd century B.C.) to seat 15,000 people. The sports area was 191 m x 30 m, surrounded by the tribunes for the seats on each side.
During the Roman age the theatre was restored extensively. Eastern end to the field was closed with Corinthean style 16 columns and archs, connecting the columns at the top end.
The structure is a good example of the Hellinistic and Roman influence on the architecture of Miletos.