The West Chamber of a double cistern lying between the northeast corner of the Theseion and the Annex to the Stoa of Zeus Eleftherios. ... Both chambers went out of use as water containers simultaneously ... 225-165 B.C.
The fill in this cistern is Byzantine with considerable admixture of Greek IV-III c. B.C. Coins:
7 March 1932 #9
9 March 1932 #1
10 March 1932 #1-#2
11 March 1932 #2
12 March 1932 #1 ... 11th-12th c. A.D.
The East Chamber of a double cistern lying between the northeast corner of the Theseion and the Annex to the Stoa of Zeus Eleftherios. ... Both chambers went out of use as water containers simultaneously ... Ca. 200 B.C.
A cave-in not long after the digging of this shaft destroyed its possible usefulness as a well and thereafter it was used as a dump. Two principle periods of such use were noted, and within these several ... Ca. 575-480 B.C.