Location
The castle is located between the Newport Bridge and the neighbouring railway bridge on the west bank of the River Usk in the city centre.
Only the east side of the castle remains, as the western portions were lost beneath Shaftesbury Street and its subsequent widening. The ruins of the castle were permanently fenced off in 2003, followed by the closure of the public footpath in 2006.
The best view of the castle is not from the 'front' on the roadside, but rather from Newport Bridge or the railway bridge, where its position on the west bank of the River Usk can best be appreciated. The projecting central tower with its water-gate or dock beneath is the dominant feature. Flanking it are two octagonal towers with prominent spur buttresses. These mark the north and south end of the castle, from which a curtain wall ran westwards enclosing a roughly rectangular area. Outside the curtain wall was a deep moat which filled with sea water at high tide.
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