Willie's Temple, Melville Castle

Willie's Temple at Melville Castle is a single-storey, circular-plan summerhouse built around 1760, situated on a hilltop. The structure is made of polished ashlar sandstone and features four arched openings with Gibbsian surrounds. Between these openings are four intermediate piers, each adorned with tall, blind arched panels framed by panelled pilaster strips that end in a convex moulding at the base, with one scrolled console remaining. The building has a moulded cornice and a stone, bell-cast roof that was originally topped with a stone pineapple finial, which collapsed around 1994.

Inside, the summerhouse may have originally had a plastered stone domed ceiling, and it includes small, round-headed niches set within the ingoes of the arched openings.