Valens Aqueduct

The Valens Aqueduct (Turkish: Bozdoğan Kemeri, meaning "Aqueduct of the grey falcon") is a Roman aqueduct which was the major water-providing system of the Eastern Roman capital of Constantinople.

Completed by Roman Emperor Valens in the late 4th century AD, it was restored by several Ottoman Sultans, and is one of the most important landmarks of the city. Historically, restoration of the Aqueducts began after the Fall of Constantinople during the final reigning years of Bayezid II.