http://agathe.gr/guide/late_roman_fortification_wall.html
Late Roman Fortification Wall East of the East Building and Mint we arrive once again at the Panathenaic Way, which in this area is lined along its eastern side by a massive wall built in the 3rd century ... Late Roman Fortification Wall East of the East Building and Mint we arrive once again at the Panathenaic Way, which in this area is lined along its eastern side by a massive wall built in the 3rd century A.D. ... The old Agora, former center of town, is not even within the fortified limits of the Late Roman town, which lay to the east. The wall is made up almost entirely of reused architectural pieces taken from buildings and monuments destroyed by the Herulians: marble architrave blocks, Ionic and Doric columns, inscriptions, and statue bases were all used to make two solid faces, while the interior was filled with rubble. ... Late Roman Fortification Wall, ca. A.D. 280–290, with many reused architectural blocks from buildings destroyed by the Herulians in A.D. 267.
