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Amgueddfa Cymru – Museum Wales
A coat of arms: the Virgin Tudfil, with distaff - denoting the industry of the borough,between two daggers - symbolising her martyrdom here early in the sixth century, encircled by the motto: NID . CADARN . OND . BRODYRDDE, and surrounded by an oak wreath ensigned with a crown, and bearing three discs displaying a blast furnace, Trevithick's engine (launched here) and the local Morlais castle.