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 is visible to the right, with the suspension bridge barely visible. Conway Town and Castle, 1800. Conwy Castle and the town walls were built, on the instruction of Edward I of England, between 1283 and 1289, as part of his conquest of the principality of Wales.Conwy was the original site of Aberconwy Abbey, founded by Llywelyn the Great.onwy Castle and the town walls were built, on the instruction of Edward I of England, between 1283 and 1289, as part of his conquest of the principality of Wales.