Korna, at the junction of the two great rivers; Amara on the Tigris; Shatra on the Shatt el-Hai canal, connecting the Tigris and Euphrates; Nasrieh, at the junction of that canal with the Euphrates and Suk esh-Sheiukh, on the lower reaches of the Euphrates, are the principal settlements, with a population varying from 3000 to ro,000 or somewhat less.
There are about 4000 Jews and perhaps 6000 Christians, among whom are reckoned the remains of the curious sect of Sabaeans or Mandaeans, whose headquarters are in the neighbourhood of Suk esh-Sheiukh.
The site is indicated by ruins of a temple, aqueducts, &c., and inscriptions on the banks of the river Barada at Suk Wadi Barada, a village called by early Arab geographers Abil-es-Suk, between Baalbek and Damascus.
The fine mosque of Sidi-el-Kattani (or Salah Bey) dates from the close of the 18th century; that of Suk-er-Rezel, now transformed into a cathedral, and called Notre-Dame des Sept Douleurs, was built about a century earlier.
The gypsiferous and saliferous marls of Shellata, Suk Ahras and Ain Nussi have yielded Triassic fossils.