The Commercial Market, also known as Tetragonos Agora, was the commercial hub of the ancient city of Ephesus, built during the Hellenistic period and expanded in the Roman era. This square marketplace was surrounded by columns, each side measuring 110 meters, and featured shops and rooms used for political meetings and court proceedings. It is within walking distance of Ephesus (341 m), Celsus Library (22 m), and the Church of Mary (685 m).