Portus Adurni / Portchester Castle

17 Apr 2000
Portus Adurni, Fareham, Hampshire, PO16 9QR
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Portchester Castle, Castle Street, Fareham, Hampshire, PO16 9QR
Photograph (Digital)


This information is taken from the statutory List as it was in 2001 and may not be up to date.


5231 (South End) Portchester Portchester Castle SU 6204 11/203 18.10.55.



A Scheduled A.M, in the care of the Department of the Environment. The main walls are those of the Roman fort Portus Adurni built in the late C3 or early C4. They form a square 200 yds wide and enclose between 8 and 9 acres. They are of flints with bonding courses of brick or stone, but have been substantially repaired in the mediaeval period. Originally there were hollow semi-circular bastions in the angles and 4 on each side. Of these 20 bastions, 14 survive. The entrances were in the centre of the west and east sides, but the gateways now standing are both mediaeval. Of the west or land gate, the lower storey is C12, ashlar, with a 3-centred archway and originally stone vaulting to the roof but this has mostly fallen away.

The upper portion is C14, stone rubble, and has 1 window containing 2 tiers of 3 lights on the inner side and 2 corbel heads above the cornice. The east or watergate is a shell divided into 2 sections with an archway between. It is faced with ashlar.

The outer portion is C14 and has a portcullis groove to the archway. The inner portion is older and has a circular turret staircase in the south west corner.

In the north west corner of the Roman fort a mediaeval castle was built in the reign of Henry II with a massive keep in the angle of the Roman walls, which were cut away by a surrounding wall on the east and south sides forming an inner bailey with a projecting tower in the south east corner and a gateway in the south wall with a moat to the south and east filled with water at high tide by a sluice in the Roman wall. The keep, which projects beyond the Roman walls, is intact. It is 40 ft square and the walls are 8 ft thick. The 3 original storeys were built about 1160 and the 4th storey added in the early C13. The remaining buildings are now ruined. Those along the west and south walls of the inner bailey and Assheton's Tower in the north west corner were erected in the C14 and those to the south of the latter along the west wall in the C17. Photographs in the N.M.R. and article in Country Life, Volume 75.

Portchester Castle forms a group with St Mary's Church, the Churchyard walls, the lamp in the Churchyard and the lychgate.

Listing NGR: SU6222404655


This is part of the Series: IOE01/0062 IOE Records taken by M G Askew; within the Collection: IOE01 Images Of England


© Dr M.G. Askew. Source: Historic England Archive

This photograph was taken for the Images of England project

People & Organisations

Photographer: Askew, M.G.

Rights Holder: Askew, M.G.


Ashlar, Brick, Flint, Rubble, Stone, Roman Fort, Defence, Gate, Unassigned, Castle, Monument <By Form>, Bailey, Fortification, Keep, Moat, Domestic, Water Supply And Drainage, Tower, Building, Sluice, Maritime, Water Regulation Installation, Bastion

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