It is unclear when this folly in the grounds of Ballycumber House, County Offaly was constructed. It may date from the mid-18th century when the property’s then-owner Warneford Armstrong carried out alterations to the main building, or perhaps from the early 19th century during the time of his grandson John Warneford Armstrong. The latter travelled extensively abroad and in her book Flights of Fancy: Follies, Families and Demesnes in Offaly, Rachel McKenna describes the folly as ‘a curious structure, circular in plan with soaring buttresses, perhaps reminiscent of great cathedrals seen on distant shores.’ Set on an artificial mound to the north-east of the house, there are tall arched openings between all the stepped and pinnacled buttresses except for one section of solid wall; this originally held a fireplace to warm the interior. Presumably there was a roof, likely domed, but this has entirely gone. The building was restored some years ago by the Follies Trust.