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Cof Cymru: National Historic Assets of Wales · Wales

The Observatory

Milford Haven, Pembrokeshire, Wales

The record

Designation
Listed building, Grade II*
Broad class
Domestic
Date of designation
3 June 1964
Locality
Hakin
Community
Milford Haven
Unitary authority
Pembrokeshire
Country
Wales
Coordinates
51.71263, -5.05261
Cadw reference
12922

Slide toward Today to fade the historical sheet and see the modern map underneath.

David Rumsey Map Collection, Stanford Libraries

Shown on 5 historical map sheets, the earliest the 1636 "Cornubia : Devonia, Somersetus, Dorcestria, Wiltonia, Glocestria ..." (David Rumsey Map Collection, Stanford Libraries).

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This record in Cadw's own full report ↗

Cadw's description

Situated on short lane running W off Picton Road to Rugby Football Club some 200m N of County Infants School.

Circa l805 ruins of observatory built for Charles Greville as part of the early foundation of Milford, intended as the centrepiece of a 'College of King George III', but although the observatory was built and equipped the project was abandoned on Greville's death in l809.

Rubble stone octagonal observatory with upper part vaulted and slit for telescope openings, the segments of the vault now free-standing leaving a top opening of some 8 feet diameter. Two segments have collapsed inwards. The inner vaulting was of brick. Original ground floor has arched entry with cut stone arch, and circular interior with remains of ceiling vaulting.

Low single storey outbuildings to W, E and N in rubble stone, that to left with one door and plain stone voussoirs to head, that to right has short recessed section with arched doorway and then blank arched panel in main part. Rear of this section has one arched window and corresponding door in recess. N rear wing is altered.

Scheduled Ancient Monument: Pe 387

A very early example of the domed observatory with slit openings.

Nearby in the register

Other entries of the same register within about three miles of this one, by straight line.

Designated Historic Asset GIS Data, The Welsh Historic Environment Service (Cadw), 2026-09-07, licensed under the Open Government Licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ Cadw, the Welsh Historic Environment Service · Open Government Licence v3.0
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