Monument to SOuth of Later Altar of Zeus. General Note. Monument Bases Between South Wing of Stoa and Great Drain. Early Poros Geison. Monument Bases to East of Great Drain. Large Base at 21/ΛΣΤ, Plan ... Η'-12 2253, 2254 A 759 ... 1933 ... Removal of Section of Foundation to Explore South Side of 12 Gods ... Monument to SOuth of Later Altar of Zeus ... General Note