The Pantheon Including Addition to the Rear

The Pantheon is a large octagonal building dating from the 19th century, featuring plastered walls and pilasters at the corners, topped by a ribbed dome and an elegant octagonal cupola with a gilded ball finial. The southwest side has tall arched windows with multi-pane glazing alongside a large Gothic-style porch. This two-storey porch originally served as a fireplace and is made of painted red sandstone. It includes two segmentally-headed arches on the ground floor and six narrow windows above, all adorned with ornamental Gothic decoration and painted white. The porch has a parapetted top with eagle sculptures at the canted corners, and a sequence of oval oculi runs around the top.

At the rear of the Pantheon, there is a single-storey addition with rendered elevations and a slate roof, consisting of two conjoined blocks with an angled central chimney. This chimney features a cupola-like top with an upturned copper wash boiler as a finial. The addition has tripartite multi-pane windows and a part-glazed door on the gable of the western-most section. A short link wall with an open arch connects this section to the adjacent Chantry Row, while another arch links the eastern block to the corner of the Belvedere.

In front of the Pantheon, there is a balustraded terrace with steps leading down to the lane opposite Battery Square.