Single (music) - Types. 1  Singles have been issued in various formats, including 7-inch (18 cm), 10-inch (25 cm), and 12-inch (30 cm) vinyl discs (usually playing at 45 rpm); 10-inch (25-cm) shellac discs (playing at 78 rpm); cassette, 8 and 12 cm (3- and 5-inch) CD singles and 7-inch (18 cm) plastic flexi discs.
Conwy Castle. Conwy Castle, a World Heritage Site, is a magnificent fortress in North Wales. Built by James Saint George for King Edward I, it has towered over the medieval town of Conwy ever since.onwy Castle. Conwy Castle, a World Heritage Site, is a magnificent fortress in North Wales. Built by James Saint George for King Edward I, it has towered over the medieval town of Conwy ever since.
Conwy Castle. In the town of Conwy, Aberconwy & Colwyn, north Wales Map link for Conwy Castle All photographs copyright Â© 2006 by Jeffrey L. Thomas Above: Conwy Castle viewed from the town wall (tower #13).Below: Conwy's northern towers viewed from the town.Jeff Thomas.nyone looking at Conwy Castle for the first time will be impressed first and foremost by the unity and compactness of so great a mass of building, with its eight almost identical towers, four on the north and four on the south, pinning it to the rock on which it stands.