Carnarvon (Caer-yn-ar-Fon,' fort opposite Mon, or Anglesey'), the capital of Carnarvonshire, stands near the south end of the Menai Strait, on the right bank of the Seiont, 69 miles W. of Chester. Carnarvon Castle, the building of which was commenced by Edward I. in 1283, is one of the noblest ruins in the kingdom, the walls, 7 to 9 feet thick, being still entire, and enclosing an oblong of three acres. The gateway under the great square tower has four portcullises. The city walls, with several of the gates, still exist, but are now within the town. A municipal borough, Carnarvon unites with Pwllheli, Nevin, Criccieth, Conway, and Bangor to return one member to parliament. The harbour admits ships of 400 tons. The chief exports are slates, stones, and ores. There are also iron and brass foundries. Carnarvon is a bathing-place, and is much frequented by tourists. Pop. (1851) 8674; (1901) 9760. Half a mile from Carnarvon are the remains, covering seven acres, of Segontium, or Caer Seiont, a Roman station or city. There is a Roman fort on the left bank of the Seiont, still almost complete, with walls 11 feet high and 6 feet thick. Carnarvon was the seat of the native princes of North Wales down to 873. In 1284 was born here the first Anglo-Norman Prince of Wales, afterwards the unhappy Edward II.