DOLHAIN, the most eastern town of Belgium, situated on the Vesdre, north-east of Verviers and close to the Prussian frontier. It is quite a modern town, occupying the site of the lower town of the ancient city of Limburg, which was destroyed by Louis XIV. in 1675. On a rocky eminence above Dolhain are still to be seen the fine ruins of the old castle of Limburg, the cradle of the ancient family of that name from which sprang the Luxem burg family and several emperors of Germany. At a short dis tance from Dolhain is the famous dam of the Gileppe, the vast reservoir constructed to supply Verviers with water free from lime for its cloth manufactures.