The old British fort, Caer Drewyn, one of a chain of forts from Dyserth to Canwyd, is the supposed scene of Glendower's retreat under Henry IV., and here Owen Gwynedd is said to have prepared to repulse Henry II.
Machynlleth (perhaps Maglona in Roman times) has Owen Glendower's "senate house" (1402), and is known as the scene of Glendower's attempted assassination by Dafydd Gam.
An assembly of Welsh nobles was actually summoned to meet in 1406 at Machynlleth in an ancient building still standing and known to this day as " Owen Glendower's Parliament House."
It consists of small squares and narrow streets, with a free grammar school (1665), market hall, assize hall, county gaol, &c. The so-called parliament house (1404) of Owen Glendower's members has been demolished.
Glendower's treaty with Charles of France (Owinus D.G.
The county family, Vaughan, claims descent from Rodric Fawr, king of North Wales, Glendower's kinsman and enemy lived at Nannau.