|Summary:||Stoa; approximately in the middle of the Agora and dividing it into north and south areas.|
|Date:||ca. 175 BC - 150 BC|
146.64 m x 16.96 m (ext.); outer colonnade column diameter: 0.78 m; intercolumniation: 2 m; inner colonnade intercolumniation: ca. 6 m.
Doric, two-aisled stoa, completely surrounded by unfluted Doric columns. The center colonnade of 23 columns, may have been Ionic, and the center columns may have been connected by screens to divide the stoa into halves. The Middle Stoa was the northern side of the area known as the South Square.