http://agathe.gr/overview/the_site_before_excavation.html
The Site before Excavation The Agora lies on sloping ground northwest of the Acropolis, below and east of the extraordinarily well-preserved Doric temple of Hephaistos, popularly known as the “Theseion” ... The Site before Excavation The Agora lies on sloping ground northwest of the Acropolis, below and east of the extraordinarily well-preserved Doric temple of Hephaistos, popularly known as the “Theseion” (a). The marble giants (b and below), reused as the facade of a Late Roman complex, were always visible, as was the north end of the Stoa of Attalos, preserved to its full height. ... The Stoa of Attalos (c) was cleared of debris by the Greek Archaeological Society in 1859/1862 and 1898/1902, the extension of the Athens/Piraeus railroad (d) cut through the northern part of the site in 1890/1, and other areas (e.g., e) were opened up by German and Greek archaeologists in 1896/7 and 1907/8.