kim traynor on Geograph Erected on a site near the extremity of the ancient town wall built in the reign of James II King of Scots AS 1450 for the protection of Edinburgh against invasion Johnston Terrace, Edinburgh Colour: This plaque is purple, white and green glass claret orange purple clear bronze grey stone red slate wood blue black brass multicoloured pink brushed metal green maroon film cell green and red Belgian Blue Stone red and black yellow terracotta marble brown silver white gold Wikimedia: Flickr: Google Streetview OpenStreetMap