Gregynog (Welsh pronunciation: [ɡrɛˈɡənɔɡ]) is a large country mansion in the village of Tregynon, 4 miles (6 km) northwest of Newtown in the old county of Montgomeryshire, now Powys in mid Wales. There has been a settlement on the site since the twelfth century. From the fifteenth to the nineteenth century it was the home of the Blayney and Hanbury-Tracy families. In 1960 it was transferred to the University of Wales as a conference and study centre by Margaret Davies, granddaughter of the nineteenth century industrial magnate and philanthropist, David Davies 'Top Sawyer' of Llandinam.