From the extensive bibliographical material which is available it is manifestly impossible to cite more than a fraction here. The outstanding books are Dörpfeld-Reisch, _Das griechische Theater_ (1896), defended against reviewers and partially modified in “Das griechische Theater Vitruvs,” _Athenische Mittheilungen_, XXII (1897), 439 ff., and XXIII (1898), 326 ff.; Puchstein, _Die griechische Bühne_ (1901), answered by Dörpfeld in _Athenische Mittheilungen_, XXVIII (1903), 383 ff.; and Fiechter, _Die baugeschichtliche Entwicklung des antiken Theaters_ (1914), summarized by its author and criticized by Dörpfeld in _Jahrbuch d. arch. Instituts, Anzeiger_, XXX (1915), 93 ff. and 96 ff., respectively. Other important publications are von Wilamowitz-Möllendorff, “Die Bühne des Aischylos,” _Hermes_, XXI (1886), 597 ff.; Todt, “Noch Einmal die Bühne des Aeschylos,” _Philologus_, XLVIII (1889), 505 ff.; Capps, “Vitruvius and the Greek Stage,” _University of Chicago Studies in Classical Philology_, I (1893), 3 ff.; Bethe, _Prolegomena zur Geschichte des Theaters im Alterthum_ (1896), and “Die hellenistischen Bühnen und ihre Decorationen,” _Jahrbuch d. arch. Instituts_, XV (1900), 59 ff. (answered by Dörpfeld in “Die vermeintliche Bühne des hellenistischen Theaters,” _ibid._, XVI [1901], 22 ff.); Petersen, “Nachlese in Athen: Das Theater des Dionysos,” _ibid._, XXIII (1908), 33 ff.; and Versakis, “Das Skenengebäude d. Dionysos-Theaters,” _ibid._, XXIV (1909), 194 ff., answered by Dörpfeld, _ibid._, pp. 224 ff. Still other titles will be cited as they are needed in the discussion. See also p. 221, below. For reports on the excavations of various theaters the reader should consult the bibliographical references given by Dörpfeld-Reisch and Fiechter in their footnotes. [119] For a slight variability in the application of the word orchestra see p. 83 and nn. 1 and 2, below; see also p. 72, n. 3. [120] Fig. 22 is specially drawn and does not exactly reproduce any single theatrical structure. Fig. 23 is taken, simplified and slightly altered, from Dörpfeld-Reisch, _Das griechische Theater_, Pl. VIII (_a_).