An interesting Hittite symbol which occurs both in the sanctuary at Boghaz-Keui and at the palace of Euyuk is the double-headed eagle. In both places it serves as the support of divine or priestly personages. After being adopted as a badge by the Seljuk Sultans in the Middle Ages, it passed into Europe with the Crusaders and became in time the escutcheon of the Austrian and Russian empires. See W. J. Hamilton, _op. cit._ i. 383; G. Perrot et Ch. Chipiez, _op. cit._ iv. 681-683, pl. viii. E; L. Messerschmidt, _The Hittites_, p. 50. M100 The two deities at the head of the processions at Boghaz-Keui appear to be the great Asiatic goddess and her consort. The Hittite god of the thundering sky. Jupiter Dolichenus. 410 W. J. Hamilton, _Researches in Asia Minor, Pontus, and Armenia_, i. 394 _sq._; H. Barth, in _Monatsberichte der königl. Preuss. Akademie der Wissenschaften_, 1859, pp. 128 _sqq._; _id._, “Reise von Trapezunt,” _Ergänzungsheft zu Petermann’s Geograph. Mittheilungen_, No. 2 (Gotha, 1860), pp. 45 _sq._; H. F. Tozer, _Turkish Armenia and Eastern Asia Minor_, p. 69; E. Chantre, _Mission en Cappadoce_, pp. 20 _sqq._ According to Barth, the scene represented is the marriage of Aryenis, daughter of Alyattes, king of Lydia, to Astyages, son of Cyaxares, king of the Medes (Herodotus, i. 74). For a discussion of various interpretations which have been proposed see G. Perrot et Ch. Chipiez, _Histoire de l’Art dans l’Antiquité_, iv. 630 _sqq._ 411 This is in substance the view of Raoul-Rochette, Lajard, W. M. Ramsay, G. Perrot, C. P. Tiele, Ed. Meyer, and J. Garstang. See Raoul-Rochette, “Sur l’Hercule Assyrien et Phénicien,” _Mémoires de l’Académie des Inscriptions et Belles-Lettres_, xvii. Deuxième Partie (Paris, 1848), p. 180 note 1; W. M. Ramsay, “On the Early Historical Relations between Phrygia and Cappadocia,” _Journal of the Royal Asiatic Society_, N.S. xv. (1883) pp. 113-120; G. Perrot et Ch. Chipiez, _Histoire de l’Art dans l’Antiquité_, iv. 630 _sqq._; C. P. Tiele, _Geschichte der Religion im Altertum_, i. 255-257; Ed. Meyer, _Geschichte des Altertums_,2 i. 2. pp. 633 _sq._; J. Garstang, _The Land of the Hittites_, pp. 235-237; _id._, _The Syrian Goddess_ (London, 1913), pp. 5 _sqq._