obvious once the military opportunities... had been removed". The economic weakness of Cefnllys is also emphasised by historians Oliver Creighton and Robert Higham. Major outbreaks of bubonic plague across Britain in 1349, 1361–62 and 1369 contributed to its failure, and the persistent threat of violent conflict within the March expedited its demise. Cefnllys remained a borough after the decline of the medieval settlement, and according to the 1831 census it comprised, besides the church and castle ruins, 16 inhabitants in "three Farm Houses and one small Cottage". See also Cefnllys (medieval town) Maelienydd Dineithon References Notes Citations Bibliography External links Cefnllys Castle – 2006 RCAHMW report on Castle Bank, with a summary of its historical context and visible earthworks. Cefnllys site details – Coflein information page with links to digital images, details of associated sites and information on archive records. Castles in Powys Hill castles Scheduled monuments in Wales Former populated places in Wales Landmarks in Wales Castle ruins in Wales