1966 Westminster Abbey 900th Anniversary Medallion Designed by renowned sculptor Michael Rizzello, this impressive medal or medallion was issued to commemorate the 900th anniversary of the founding of Westminster Abbey in 1065 / 1066. Diameter 57mms, weight 127.3 grams of 22ct gold = 3.7517 troy ounces of fine gold content. A really impressive piece of numismatic art, and wonderful to hold in your hand. (If only we could sell it! - LC).