Note 99 — Chapter IV · GENESIS OF THE EARLY MOHAMMADAN PALACE

Early Hellenistic barrel vaults in the Mediterranean coast-lands. Delbrück, op. cit., pt. ii. Table A, p. 64. Cut stone vaults showing characteristics of brick construction, such as vaulting in concentric courses, vaults outlined by mouldings, vaults with uncentered joints, and a single example of the horse-shoe vault at Chiusi, idem, Table B, p. 67. In Egypt and in western Asia solutions were sought to further problems of stone vaulting, the intersection of stone barrel vaults, vaulting in inclined planes, the stone dome with or without voussoirs. At first these were in general confined to the East; the evolution in the West begins in the Roman Imperial period. Delbrück, pt. ii. pp. 77-80. Development of the Egyptian cut stone vault out of sun-dried brick construction, idem, pp. 80-3.