Mr. Benson in the preceding paper has given an account of the new facts which have been brought to light by the complete clearing of the Thersilion. With regard to these points of fact there can be no question and in the deductions to be drawn from them we are for the most part agreed. It remains to be seen whether from the remains before us we can reconstruct a building of any known Greek design, in other words, whether we can discover what was the builder's plan and how he developed it. At first sight a large columned hall of this nature appears to be un-Greek in character: the only parallel we can produce for it is the late Hall of the Mysteries at Eleusis, which however only resembles it in the badest characteristics. Where we do find halls which resemble this building however is in the East. The Hall of the hundred columns at Persepolis (Perrot et Chipiez, v. p. 723) presents several striking analogies: like the Thersilion it is a large square building on one side flanked by a portico while we have two doors on each of the other three. Now, as is clearly shown by the character of the building, the Thersilion belongs, in its original plan, to the earliest period after the foundation of Megalopolis by Epameinondas. That is sufficiently proved by the cramps and the. use of tufa rather than conglomerate for the foundation bases. Moreover just at this period we have a direct communication between Persia and Megalopolis in the person of Antiochus, who visited Susa as a delegate from the Arcadian league in 367 B.C. (Xen. Hell. vii. 1, 33–38 J.H.S. Supp. Pap. I. p. 128), and it is quite possible, whether he was the dedicator of the theatre thrones or not, that he brought back the idea of such a columned hall from the East. But it can have been only the general idea that was so brought to Megalopolis: the arrangement of the columns in the Thersilion is entirely different from that of its prototypes in the East, while the inward slope of the floor is also a new element. Thus, though this building may have owed its origin and shape to the East, its plan, as I will endeavour to show, is taken from a common Greek type, and is in fact simply that of a Greek theatre.