MACRON TEICHOS(Μακρὸν τεῖχος), also called the wall of Anastasius,was a fortification constructed in A.D. 507, by the emperor Anastasius I. of Constantinople, as a means of defence against the Bulgarians: it consisted of a strong wall running across the isthmus of Constantinople, from the coast of the Propontis to that of the Euxine, Some parts of this wall, which at a later period proved useful against the Turks, are still existing. (Procop. de Aed. 4.9; comp. Dict. of Biogr. Vol. 1. p. 159.)
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