Conway, or Aberconway, a picturesque little seaport of North Wales, in Carnarvonshire, on the left bank of the river Conway at its estuary, 45 1/2 miles WNW. of Chester by rail. The river is crossed by a fine tubular bridge (412 feet long), constructed by Stephenson in 1848, as well as by Telford's suspension bridge (1826). The town is triangular in form, and is surrounded by a high wall 12 feet thick and 1 mile in circumference, pierced by four Moorish-looking gates, and crowned by twenty-one round towers. In its south-eastern corner, rising proudly from a rock above the river, is the ruined castle, built soon after the Conquest by Hugh, Earl of Chester, and rebuilt in 1284 by Edward I., to check the Welsh. Its walls are 12 to 15 feet thick, with eight vast towers, four of which are each surmounted by a slender turret. The Plas Mawr ('great mansion') is a noble timber house (1585), without and within profusely covered with ornament. Conway (a chartered borough since 1876) is one of the six Carnarvon boroughs. Pop. 4800.