building after the First World War, and social change undermined the construction of rural country houses. Isolated examples of "castles" include houses that combine modern and traditional elements, such as Basil Spence's Broughton Place (1936) and Glenskirlie Castle, Stirlingshire (2007). Restoration of castles began in the early twentieth century, with projects including the renovation of Duart Castle on Mull, and the complete reconstruction of Eilean Donan from a few fragments of masonry. The restoration movement grew after World War II with a fashion for renovating tower houses, including Oliver Hill's restoration of Inchdrewer Castle, near Banff in Aberdeenshire, in 1965. The restoration of tower houses and smaller castles continues, with recent examples including Fenton Tower in Lothian and Ballone Castle near Portmahomack. Historic Scotland have launched a "Scottish Castle Initiative" aimed at encouraging private investment in the restoration of Scotland's castles, including a register of potential restoration candidates. Despite these efforts, a number of castles remain on Scotland's Buildings at Risk Register. Most of Scotland's castles, whether ruined or occupied, remain in private ownership, though many are open to the public at least occasionally. During the twentieth century a number of older castles were transferred into the care of the state, and these are now the responsibility of Historic Scotland, which was created as an agency in 1991. Historic Scotland cares for over 300 properties – all of which are publicly accessible – including around 65 castles. These include some of Scotland's most famous castles including Edinburgh and Stirling, as well as numerous tower houses and ruined castles. The National Trust for Scotland (founded 1931) cares for several post-Medieval castles and estate houses, including Culzean and Craigievar that were still in occupation until the twentieth century. The Landmark Trust restores and operates historic buildings as holiday homes, including Saddell Castle, Castle of Park and Roslin Castle. Several other castles are in the hands of local government, for example Dudhope Castle in Dundee, and some are maintained by building preservation trusts and other charitable bodies, for example Sauchie Tower, Clackmannanshire. See also Broch Castles in Great Britain and Ireland List of castles in Scotland Notes 12th-century establishments in Scotland Architecture in Scotland