Urban Aqueduct in Istanbul
Last week I wrote about the incredible Basilica Cistern in the heart of the Sultanahmet, or historic center, of Istanbul. All the water needed to fill that and other cisterns in Constantinople was brought in through an extensive aqueduct network which partially survives today. The most significant portion is the Valens Aqueduct constructed by Emporer Valens in the 4th century AD. It is about 95 feet high with about a 13 foot arch span which now allows cars to drive through the Byzantine aqueduct.