There was Augustinian Square, surrounded with colonnaded cloisters in front of Hagia Sophia Church in Byzantine Age. Monumental Milion Stone (Milestone) is erected in the beginning point no: 0 (zero) of Mese Avenue (Divanyolu) in the center of Istanbul and of the road, named as Triumph Way of Byzantine’’, and going from Istanbul to Rome in Basilica Cistern side of this square. Top of this stone was decorated with sculptures and reliefs in its time. It is widely told first erected milestone is “Golden Milion Stone”. There are remains of water gauge, belonging to Ottoman period and increasing like a tower and adjusting water pressure and damaged considerably, immediately near this stone.