Since the early nineteenth century Cwrt Plas yn Dre in Dolgellau, Merioneth, had been identified as the location for one of Owain Glyn Dur's parliaments. Most of the building was demolished in the 1870s but a section was saved and removed to Newtown, Montgomeryshire, by Mr Pryce Jones the founder of the Royal Welsh Warehouse, and rebuilt in the grounds of his house, Dolerw, where it can be seen today. The sources, both documentary and visual, explain the growthand later refutationof the connection with Glyn Dur. The story of Cwrt Plas yn Dre also sheds light on the national and local politics of later nineteenth-century Wales and on the growing interest in the preservation of historic buildings. Various nineteenth-century illustrations allow us to understand the original appearance and plan of Cwrt Plas yn Dre as it stood in Dolgellau. It was a substantial and ambitious gentry house comprising an open hall range to which was added a smart timber-framed wing at some point between 1518-31, a date established by dendrochronology. The hall may have dated from the mid- to late fifteenth century, but in all probability formed part of a single long building campaign carried out over several years by Owen ap Howell ap Llewelyn and his ambitious but ill-fated son, Lewis Baron Owen, who was murdered in 1555.
Parry et al. (Thu,) studied this question.