Page "Silivri" Paragraph 45

* The Anastasian Wall, also known as the Long Walls of Thrace, was constructed by Byzantine emperor Anastasius I ( 491-518 ) as part of an additional outer defense system for Constantinople during the 5th century and probably was in use until the 7th century.

Comparable only with Hadrian's Wall in England in its complexity and preservation, the fortification stretches some 56 km from Black Sea coast across the Thracian peninsula to the Sea of Marmara at west of Silivri.