Armoury at Fort Williamsburg including attached screen walls

Roughly square building that is Neo-classical to north-west facing into the parade ground and with some simple Gothick treatment to the rear. Mostly single storey but two-storey to rear. Rubble construction, mostly cement-rendered. Slate roof with wide eaves and paired and dentilled brick chimney stacks. The main 3-bay front with pediment treatment given by toothed cornice over the three tall round-arched openings. The central of these was originally a doorway but has been converted into a window; the windows are small-pane three-tier sashes including lunettes. An impost band and corresponding bases gives the design the appearance of having pilasters. 9-pane sash to sides. Rubble to the rear facing the Barracks with blocked 1st floor openings and only one small-pane pivot window remaining. At either end of the ground floor are boarded doors with pointed-arched heads within square-headed openings. Between are three 2-light windows with Gothick small-pane casement glazing; slate lintels.

Either side are attached quadrant screen walls of rubble both with arched gateways into the former parade ground. That to south (left) returns back to the tunnelled gateway that leads into the barracks.

The fort is roughly square with redans to the four corners and with surrounding ditches and revetment walls.

Not accessible at time of inspection as used for storage by Gwynedd Archives.