Most Common Symbol is of course the E '' R on Letter Boxes, painting them green hardly changes anything.The Plaque below can be found on a small drinking fountain near the Merthyr Tudful Town Library, the plague after unbelievably has been put on the wall of Senedd Glyndwr in Machynlleth. Who the hell thought of that? sure as hell stamps English Sovereignty over Owain Glyndwr and the Parliament of Free Wales established there on 21 June 1404.