http://agathe.gr/overview/the_altar_of_zeus_and_statue_of_hadrian.html
The Altar of Zeus The Agora Excavations began with the aim of revealing the monuments and history of the ancient Agora. Of course, every artifact or feature that was exposed held importance, but when something ... View of the orthostate block (A 404) of the Altar of Zeus Agoraios Nb. Ε III, pp. 503–504; July 23, 1931. ... The altar was later identified as the Altar of Zeus Agoraios, an important ancient monument believed to have been erected first on the Pnyx in the 4th century B.C. and later dismantled and re-erected at the turn of the millenium in its present location. ... In the center background are the steps of the Altar of Zeus Agoraios and its large altar block.