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.
Architecture. The Belvoir Castle is built mostly from the same black basalt upon which it stands, with limestone employed as freestone as well as for much of the inner and upper parts of the inner ward. It consists of two almost square enceintes, one inside the other, both defended by projecting rectangular towers.rchitecture. The Belvoir Castle is built mostly from the same black basalt upon which it stands, with limestone employed as freestone as well as for much of the inner and upper parts of the inner ward. It consists of two almost square enceintes, one inside the other, both defended by projecting rectangular towers.