Jackson, Thomas Graham, Sir, 1835-1924 · Cambridge : University Press · leaf 178
vaults, and which, beingcombustible, have often caused the destruction of thefabric. There is so little in the Byzantine churches tocatch fire that they have escaped the frequent conflagra-tions to which Stamboul, being mainly built of wood, isliable^Thedoubie The double narthex is a constant…