Portumna Castle and Demesne occupy a magnificent location on the shores of Lough Derg on the River Shannon. Although gutted by fire in 1826, the Castle is still an imposing example of Irish architecture of the early 17th Century. Built before 1618 by Richard de Burgo, 4th Earl of Clanricarde, the castle became the main seat of the de Burgo family for over 200 years. Architecturally, the building marks the transition from the medieval Tower House to the Renaissance style manor house with complimentary influences from both periods. Following the fire and the ravages of time, the castle degenerated into a roofless shell. However, since 1968, the Office of Public Works re-roofed the building and based on extensive archaeological and historical research, other major conservation and partial restoration works continue to be carried out by a team of skilled craftsmen.