The temple had no opisthodomos as usually understood, but this name was given at Didyma to the west wall of the adyton. The adyton floor was covered with a pavement in later centuries, but in the third century B.C. a grove of bay trees, it appears, grew in the adyton (and this is probably true of the archaic Didymeion).
1988, Joseph Eddy Fontenrose, Didyma: Apollo's Oracle, Cult, and Companions, University of California Press, page 40