Royal Welsh Yacht Club (also known as Porth yr Aur)

The Royal Welsh Yacht Club, also known as Porth yr Aur, is a largely 19th-century structure built mainly of coursed limestone, incorporating elements of earlier design. It functions as a 2-storey gateway with a single-storey barbican projecting on the west side, facing the Promenade, and is flanked by two two-stage round towers. These towers contrast with the polygonal towers of a nearby castle.

The barbican features low battlements and projecting square corner turrets, with pointed arches in the front and side walls leading to a rendered tunnel vault. The main gateway also has a pointed tunnel vault, covered in cement render, with lower arches at each end and a portcullis slot on the inner east side. The north tower has 19th-century three-light mullioned and transomed windows with shouldered heads on each storey, with red sandstone dressings. A narrow light is set in the lower stage, in the angle formed with the Town Wall. A corbelled former garderobe with a lean-to stone roof is attached to the upper stage, above the Town Wall. The south tower mirrors the north tower's red sandstone dressings and shouldered heads, containing a three-light window in the lower stage and a cross window above. A continuous embattled parapet tops the towers and gateway. A doorway on the right side of the main gateway, with a pointed arch, boarded door, and strap hinges, provides access to the parapet over the barbican, with three narrow slits to the left.

The east side, facing High Street, is constructed in 19th-century Gothic style and extends outwards from the original rear wall to create a two-storey, three-window front, with red sandstone dressings. A segmental archway leads to a passage. On the right side of the gateway, a three-light window with shouldered heads is visible in the lower storey, while a single-storey lean-to has been added to the left of the gateway. A moulded band separates the floors. The upper storey contains a cross window on each side and a two-light mullioned and transomed window with Decorated tracery in the centre. Another moulded band runs along the base of the parapet, which has a saddleback coping and an added iron hand rail. A short two-storey toilet extension is located on the left (south) side. Inside the passage, pointed doorways with studded doors are positioned on either side of what was originally the gateway arch.

A dog-leg staircase with turned balusters and square newels in the south tower leads to the main club rooms above. The upper stage of the north tower contains a brick ogee-headed fireplace with a stone overmantel supported on corbels and a raked hood. A similar overmantel is found above the fireplace in the room above the gateway. A doorway with a shouldered lintel leads to the garderobe, while a similar doorway connects to the toilet block added on the south side. Stone steps, incorporating a late 13th-century newel stair, run through the north tower to the parapet.