Another remarkable instance of deviation from the ordinary practice is supplied by the theatre at Megalopolis.[451] In this theatre (Fig. 11) the place of the stage-buildings was taken by a vast council-chamber, called the Thersilion, which faced towards the auditorium. Its façade consisted of a vestibule, 26 feet high, and resting on a flight of five steps. Originally, when dramas were to be performed, a temporary wooden stage was erected in front of the Thersilion. The foundation-wall for a stage of this kind has been discovered, and lies at a distance of 24 feet from the columns of the vestibule. It is obvious therefore that the vestibule cannot itself have formed the background. A stage 24 feet across would have been far too deep for a Greek theatre. Temporary scenic decorations must have been erected some feet in front of the council-chamber. In later times a stone proscenium of the ordinary type was erected on the site of the old wooden one. But when this was done, it is probable that the Thersilion had fallen into ruins. Otherwise the beauty of its appearance would have been altogether marred by the stone structure in front of it. [Illustration: FIG. 11.] But the most peculiar of the stage-buildings which have hitherto been discovered is that at Delos. A representation of the ground-plan (Fig. 12) is inserted on the next page.[452] This building consisted of a single oblong room. In front of it was an ordinary proscenium, about ten feet deep, and eight or nine feet high, resting on half-columns. The spaces between the columns were filled, as usual, with painted boards. The curious feature is that this same proscenium was continued in a modified form round the rest of the building, so as to serve as a portico. On the sides and in the rear it rested on rectangular pillars instead of on columns. The spaces between the pillars were considerably wider than the spaces between the columns, and were left open, instead of being filled up with boards. Porticoes of this kind were often erected close to the stage-buildings, as a shelter from the rain; but the position of the one at Delos is altogether exceptional. Another remarkable feature in this building is the fact that the proscenium was open at each end, and was not even enclosed with a wall. When dramas were being performed, wooden side-wings must have been put up for the occasion.[453] [Illustration: FIG. 12.] § 12. _Wieseler’s Theory of the Greek Stage._