Full Report for Listed Buildings
The list description is not intended to be a complete inventory of what is listed: it is principally intended to aid identification. By law, the definition of a listed building includes the entire building (i) and any structure or object that is fixed to the said building and ancillary to it and (ii) any other structure or object that forms part of the land and has done so since before 1 July 1948, and was within the curtilage of the building, and ancillary to it, on the date on which said building was first included in the list, or on 1 January 1969, whichever was later.
Summary Description
Reference Number
26500
Building Number
Grade
II*
Status
Designated
Date of Designation
30/04/2002
Date of Amendment
06/02/2023
Name of Property
The Equatorial Observatory, Penllergare
Address
Location
Unitary Authority
Swansea
Community
Penllergaer
Town
Swansea
Locality
Penbwl Wood
Easting
262260
Northing
199094
Street Side
Location
Situated some 60m NW of the Neath Port Talbot Borough Council offices in Penbwl Wood.
Description
Broad Class
Recreational
Period
History
Observatory and laboratory built to house a telescope for John Dillwyn Llewelyn of Penllergare (1810-1882). He was interested in many areas of science including botany, boats driven by electric motors, astronomy and photography, and in 1855 he took one of the earliest photographs of the moon from the observatory.
Foundation stone laid 7 July 1851. The hollow blocks of which the laboratory was built were exhibited at the Great Exhibition of 1851. Renovated 1981 when the Lliw Valley Borough Council offices were built on the site of the mansion which was demolished in 1961.
Exterior
Observatory and laboratory, the observatory a cylindrical tower of tolled squared stone with C20 metal-clad cylinder above, the laboratory a single-storey neo-Jacobean structure in yellow patent blocks, larger than conventional bricks. Observatory is windowless cylinder with some small square recess close to foot of the wall and an ogee cornice, eroded and patched in cement. The C20 top part has cylinder of metal sheets. The laboratory is a single room with slate roof behind parapet. Stone plinth, terracotta-block walls, the parapet with centre shaped neo-Jacobean gables rebuilt in imitation blocks in 1981. One window to N with C20 cross-window, possibly in former door opening. Surround is chamfered with terracotta block voussoirs. S side has similar window to right and door to centre, both with similar chamfered surrounds and voussoirs. C20 door and window.
Interior
Interior of observatory inaccessible, laboratory is single room with terracotta block walls and fireplace on right end wall.
Reason for designation
Special historic and architectural interest as an extremely rare example of a mid C19 private observatory; the only other example in Wales is the partly ruinous observatory at Hakin, Milford Haven.
Cadw : Full Report for Listed Buildings [ Records 1 of 1 ]
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