Clare is very rich in stone forts, the remains of about 400 of which are known. Most of these are in the Burren district; they are akin to the great duns of the Aran Islands, and were evidently built by the same race of people. One of the most remarkable of the Clare forts, and one of the largest fortifications of any class in Ireland, is _Moghane_, which crowns a low hill in the demesne of Dromoland, a few miles south of Ennis. It is much defaced, and has been greatly neglected in the past. It consists of three stone ramparts; the innermost and the second are nearly circular, and their greatest diameters are 380 and 650 feet respectively. The outer is oval, and was adapted to the contours of the hill; it measures 1500 feet north and south, and about 1100 feet east and west. The united length of the walls is about 7850 feet, enclosing an area of 27 acres. According to Mr. T. J. Westropp, who has made a special study of these forts, and to whom archæologists are indebted for his valuable survey,[83] the estimated contents of the Moghane walls amount to about 1,177,000 cubic feet of stone. The inner cashel had two entrances, east and west; the second three, the south-west entrance being defended by a small circular fort; the outer wall had three entrances on the north and one on the south, and it was defended without by a small fort, while another within defended the wall on the west. There are no traces of terraces or steps in the inner face, though this may be due to defacement, yet the probability is, as Mr. Westropp says, that they did not exist here. He is also of opinion that this great fort was hardly built before the coming of the Dalcassians about 370 A.D.