[118] Fergusson and Burgess, _Cave Temples of India_, Plates 9 and 11. [119] De Vogüé, _La Syrie centrale_, Plate 7, and Delbrück, op. cit., pt. ii, Fig. 77. The records only have survived; the buildings themselves have disappeared. [120] Delbrück, op. cit., pt. ii, p. 145. [121] Butler, _Ancient Architecture in Syria_, Sect. A, pt iii, Fig. 185; de Vogüé, _La Syrie centrale_, vol. i, p. 47. [122] Tâg-i-Îwân, Dieulafoy, _L’Art antique_, vol. v, p. 80. [123] Dieulafoy, ibid., vol. v, p. 80. [124] Andrae, _Hatra_, pt. i, p. 18. [125] Pergamon, _Athenische Mitt._, vol. xxix (1904), p. 136, Plate 13; Delbrück, op. cit., pt. ii, Table G, and p. 103. [126] Delbrück, op. cit., pt. ii, p. 104. [127] Fergusson and Burgess, _Cave Temples_, Plates 11, 15, 24, and 28. [128] Kalybes at Shaqqah and at Umm al-Zaitûn, de Vogüé, _La Syrie centrale_, p. 44, and Plate 6. Two domes at Binbirklisse, Ramsay and Bell, _Thousand and One Churches_, pp. 80 and 241. [129] As to the date of these palaces, I accept the suggestions of Dr. Herzfeld until good reasons for modifying them have been shown. Ardashir I founded the city of Firûzâbâd in A.D. 226; the palace is probably of his time. Sarvistân belongs possibly to the time of Bahrâm V Gûr, 420-438; Qaṣr-i-Shîrîn may have been built by Khusrau II Parwêz towards the end of the sixth century. Sarre-Herzfeld, _Iranische Felsreliefs_, pp. 128-31. [130] The Sarvistân dome rests on walls some 1·50 metres thick, and is about 5 metres in diameter, according to Dieulafoy’s plan (vol. iv, Plate 3). Flandin and Coste (_Voyage en Perse_, Plate 28) extend its diameter to the outer walls, which would give it a span of about 7·50 metres, but the section which they give on Plate 29 shows that Dieulafoy’s plan is in this respect correct, and indeed no other construction is possible. [131] Balâdhuri (_Futûḥ_, p. 288) says that Ibrahîm ibn Salamah, one of the chiefs of Khurâsân, built the dome of the old Persian palace of Khawarnaq, in the khalifate of Abu Abbâs, and adds that previously there was no dome there. Possibly the domes seen by Ibn Baṭûṭah were due to this Mohammadan restoration. [132] Perrot-Chipiez, vol. ii, p. 146, Fig. 43. [133] Dieulafoy, op. cit., vol. ii, Plate 14 and vol. iv, Plate 15. Possibly there are earlier examples of the ṭâqchah than those at Persepolis. Room 11 in the big house in the Merkes at Babylon would seem from the plan to have possessed a ṭâqchah. Koldewey, _Das wieder erstehende Babylon_, Fig. 236. [134] A tube can be seen in Dieulafoy’s Plate 9, vol. iv. It runs between the inner barrel vault on the right side of the big lîwân and the domed chamber to the right of the central hall of audience. See, too, the tubes in Flandin and Coste’s sections, Plates 40 and 41 _bis_.