Saxon Shore fort and Anglo-Saxon monastery at Bradwell-on-Sea


Heritage Category:
Scheduled Monument
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Date first listed:
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Ordnance survey map of Saxon Shore fort and Anglo-Saxon monastery at Bradwell-on-Sea
© Crown Copyright and database right 2019. All rights reserved. Ordnance Survey Licence number 100024900.
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The building or site itself may lie within the boundary of more than one authority.

Maldon (District Authority)
National Grid Reference:
TM 03108 08178

Reasons for Designation

Saxon Shore forts were heavily defended later Roman military installations located exclusively in south east England. They were all constructed during the third century AD, probably between c.AD 225 and AD 285. They were built to provide protection against the sea-borne Saxon raiders who began to threaten the coast towards the end of the second century AD, and all Saxon Shore forts are situated on or very close to river estuaries or on the coast, between the Wash and the Isle of Wight. Saxon Shore forts are also found on the coasts of France and Belgium. The most distinctive feature of Saxon Shore forts are their defences which comprised massive stone walls, normally backed by an inner earth mound, and wholly or partially surrounded by one or two ditches. Wall walks and parapets originally crowned all walls, and the straight walls of all sites were punctuated by corner and interval towers and/or projecting bastions. Unlike other Roman military sites there is a lack of standardisation among Saxon Shore forts in respect of size and design of component features, and they vary in shape from square to polygonal or oval. Recognition of this class of monument was partially due to the survival of a fourth century AD Roman manuscript, the Notitia Dignitatum, which is a handbook of the civil and military organisation of the Roman Empire. This lists nine forts which were commanded by an officer who bore the title 'Officer of the Saxon Shore of Britain' (COMES LITORIS SAXONICI PER BRITANNIAM). Saxon Shore forts are rare nationally with a limited distribution. As one of a small group of Roman military monuments which are important in representing army strategy and government policy, Saxon Shore forts are of particular significance to our understanding of the period and all examples are considered to be of national importance.

Part excavation at Bradwell Saxon Shore fort has confirmed the presence of valuable features and deposits surviving in good condition both inside and outside of the masonry walls. These deposits and features contain artefactual remains relating to the occupation of the fort and the life of its inhabitants during the Roman period as well as during the period of the reoccupation of the site by the early Christian monastery. These early monastic remains are also of very great importance because of the rarity of documented buildings and other structures of this type and date. It is also thought likely that organic remains will survive which will include environmental evidence, adding to our understanding of the environment in which the fort was constructed and to our knowledge both of the character of use of the site during the Roman period and of the changes brought about during its reoccupation in the seventh century.


The monument includes a Saxon Shore fort which was subsequently reused as an Anglo-Saxon monastery, situated on the eastern tip of the Dengie Peninsular, between the River Blackwater to the north and the River Crouch to the south. The eastern part of the site, including the east wall, has been undermined by the sea and washed away. It is thought that the fort was originally rectangular in plan. The line of the western and northern defences is partly visible at the ground surface as an earthwork bank and a short section of standing masonry, representing the south wall survives on this side. The plan of the surviving part of the fort was recovered in 1864 during part excavation. The foundations of two bastions were recognised, forming part of the defences in the north west part of the fort. At the north west corner the bastion was horseshoe shaped in plan whilst further south, along the west wall the second bastion was semicircular. These bastions are believed to have been solid. The wall was more than 14 feet thick. The defences included an inner rampart with an exterior masonry face surrounded by a berm and outer ditch, which has become silted up over the years. These defences enclose an area which now covers about 2ha, although it may originally have been nearer 3ha. The interior of the fort was also investigated at this time, although no masonry buildings were recognised. Over 200 coins were found dating from Gallienus AD 260-268 to Arcadius AD 383-408 and the pottery recovered was also mostly of the same date, indicating only later Roman occupation here. A trench was cut through the western defences in 1947. At that time remains of a ditch c.20ft wide on the west and north sides of the fort were discovered. This was separated from the wall by a berm c.30ft wide on the west side and c.20ft wide on the north side. Although no trace of an internal bank was recognised during excavation, a feature was noted behind the north and west walls and a mass of yellow clay behind the south wall, both of which are thought to indicate its existence. On the line of the west wall, on the probable site of the west gate, is St Peter's Chapel, believed to have been built in 654 AD by Bishop Cedd. It incorporates much reused Roman masonry in its structure. The chapel, which survives as a standing building, is still in occasional ecclesiatical use. It is Listed Grade I and is excluded from the scheduling. In Bede's history the fort is identified as the location of the Saxon monastery founded by Cedd. It is believed that the conventual buildings lay within the fort enclosure. The monastic site is thought to have survived and developed through the eighth and ninth centuries until it was destroyed by the Danes. Excluded from the scheduling are St Peter's Chapel, all modern buildings and other structures, sheds, fences and fence posts although the ground beneath all of these features is included.

MAP EXTRACT The site of the monument is shown on the attached map extract.


The contents of this record have been generated from a legacy data system.

Legacy System number:
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Books and journals
Barford, P M, Bradwell-On-Sea; The Roman Shore Fort, Saxon Monastery & Church
Bede, V, The Ecclesiastical History of the English Nation
Bede, V, The Ecclesiastical History of the English Nation
Powell, W R, The Victoria History of the County of Essex, (1963)


This monument is scheduled under the Ancient Monuments and Archaeological Areas Act 1979 as amended as it appears to the Secretary of State to be of national importance. This entry is a copy, the original is held by the Department for Digital, Culture, Media and Sport.

End of official listing

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