AVEBURY, a village of England, in the county of Wilts, 6 miles W. of Marlborough. It occupies the site of a curious ancient structure, supposed to be Druidical. This consisted of a large outer circle formed of 100 stones of from 15 to 17 feet in height, and about 40 feet in circumference, inclosing an area of about 1400 feet in diameter. This circle was surrounded by a broad ditch and lofty rampart. Within its area were two smaller circles, each consisting of a double concentric row of stones; a stone pillar 20 feet high occupying the centre of the one, and a cromlech that of the other. Two avenues of approach, consisting of double rows of stones, branched off from this structure to other circles about a mile distant towards the S. and W. Few traces of this immense structure now remain,—the stones having been broken down and used in the construction of the houses of the village, and for other purposes. In the vicinity are a number of cromlechs and barrows: among the latter is Silbury Hill, said to be the largest barrow in Europe. It is about 2000 feet in circumference at the base, rising in a conical form to the height of 170 feet—the diameter of the summit being 120 feet.