The "Golden Mile" is located at the north end of the hippodrome and marks the eastern end of the Via Egnatia that connected the Adriatic Sea with Byzantium. Eventually it was 696 English miles [790 km.] long.
In actuallity, this stone is all that is left of a Tetrapylon—a four–sided, four–door structure where major roads of the city met. It is thought to have been erected by Emperor Constantine I during the 4th century A.D. and was destroyed in the 16th century when most of it was used in the construction of the aqueducts of Istanbul.