Bothwell thus reverted to the Douglases, and descended through the Earls of Angus and Marquesses of Douglas to the Earls of Forfar. Archibald Douglas, 1st Earl of Forfar, began construction of a new mansion nearby, demolishing the castle's north-east tower for its stone. (His house was demolished in 1926 due to mining subsidence in the area). After the death of the 2nd Earl at Sheriffmuir in 1715, the castle reverted to the senior line of the Douglas family, represented by the 1st Duke of Douglas and his heirs. The castle then descended to the Earls of Home. In 1935 the 13th Earl gave Bothwell into state care. It is now managed by Historic Environment Scotland as a scheduled monument, and is open to the public (entrance charge).