The Anastasian Wall (Greek: Ἀναστάσειον Τεῖχος, Anastáseion Teîchos; Turkish: Anastasius Suru) or the Long Walls of Thrace (Greek: Μακρὰ Τείχη τῆς Θράκης, Makrà Teíchē tês Thrákēs; Turkish: Uzun Duvar) or simply Long Wall / Macron Teichos (Ancient Greek: Μακρὸν τεῖχος)[1][2] is an ancient stone and turf fortification located 64 km (40 mi) west of Istanbul, Turkey, built by the Eastern Roman Empire during the late 5th century.

It ran from north to south through the locations what are today Karacaköy, Gümüşpınar, Pınarca, Kurfallı, Fener, Alipaşa Neighborhood and Silivri Altınorak.

Remains of the wall are visible in Gümüşpınar junction in Karacaköy, Hisartepe in Yalıköy, Pınarca in İhsaniye and Kurfallı village.

[3] The wall was part of an additional outer defense system for Constantinople, capital of the Eastern Roman Empire and probably continued in use until the 7th century.

It was built complete with towers, gates, forts, ditches and a military way to protect Constantinople from invasions from the west by Huns, Slavs and Bulgars.