Two moated sites and associated features 520m north of Grimston Garth

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Overview

Heritage Category:
Scheduled Monument
List Entry Number:
1021241
Date first listed:
11-Nov-1954

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Location

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Date:
1999-10-03
Reference:
IOE01/00619/05
Rights:
© Clive Jones. Source: Historic England Archive

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Official list entry

Heritage Category:
Scheduled Monument
List Entry Number:
1021241
Date first listed:
11-Nov-1954
Date of most recent amendment:
26-Nov-2004

Location

The building or site itself may lie within the boundary of more than one authority.

District:
East Riding of Yorkshire (Unitary Authority)
Parish:
East Garton
National Grid Reference:
TA 28398 35622

Reasons for Designation

Around 6,000 moated sites are known in England. They consist of wide ditches, often or seasonally water-filled, partly or completely enclosing one or more islands of dry ground on which stood domestic or religious buildings. In some cases the islands were used for horticulture. The majority of moated sites served as prestigious aristocratic and seigneurial residences with the provision of a moat intended as a status symbol rather than a practical military defence. The peak period during which moated sites were built was between about 1250 and 1350 and by far the greatest concentration lies in central and eastern parts of England. However, moated sites were built throughout the medieval period, are widely scattered throughout England and exhibit a high level of diversity in their forms and sizes. They form a significant class of medieval monument and are important for the understanding of the distribution of wealth and status in the countryside. Many examples provide conditions favourable to the survival of organic remains.

The two moats at Grimston survive well and significant earthwork and buried remains are preserved. Taken as whole the monument offers important scope for the study of medieval domestic life as well as the development of expressions of status.

Details

The monument includes earthwork and buried remains of two medieval moats
and adjacent ancillary features. It is located 50m inland from the sea on
the coastal plain of Holderness 5km south of Aldborough. The remains
include a large rectangular moat with a smaller secondary moat to the
north west and a range of features including ditches and ponds between the
moat and the sea.


The date of construction for the larger moated site is currently unknown
but is thought to date between the 12th to 14th centuries and was the site
of a high status manorial residence. The secondary smaller moat is thought
to have been for ornamental purposes and would have contained pleasure
gardens or orchards. The manorial residence and associated features are
all that survive of the former medieval village of Grimston, which is
known to have been in existence by the Domesday survey in 1086. It was
common for the more prestigious dwellings of medieval settlements to be
located in a prominent position away from the main settlement reflecting
importance as the habitation of the lords of the manor. Evidence from
aerial photographs and field survey shows that parts of the wider medieval
village were located some 500m to the west. These however have been
intensively ploughed and there are no earthwork remains visible.


By the 17th century the manor house was the seat of the Grimston family
until it was destroyed by fire in the middle of that century. The site
continued in use and by the 19th century there was a farm complex within
the main moat called Grimston Garth, which is shown on the Ordnance Survey
map to be on the site of an earlier building called Grimston Hall. During
the late 18th and 19th centuries the monument lay within an area called
Great Parks which was part of the wider designed landscape for the 18th
century gothic house of Grimston Garth built by Thomas Grimston in the
1780s and located 500m to the south. During this time the smaller moat
seems to have functioned as a landscape feature within the Great Parks as
it has been known as The Keep, The Mount and also as Lady Grimston's
Bower.


The large moated site includes a rectangular shaped platform, orientated
east to west enclosed on all sides by a ditch. The platform measures 89m
by 60m and the encircling ditch is up to 15m wide. Access to the moated
platform is by a causeway on the eastern side. This is shown on the 19th
century map and it is thought to be the original entrance way. Within the
moat platform there are standing farm buildings including a section of
wall believed to be the remains of the former Grimston Hall.


The second smaller moat is located 40m to the north west of the main moat.
The central platform is orientated north to south and measures 30m by 17m.
The enclosing ditch is 6m wide. Access appears to be at the north eastern
corner.


To the east of the main moat there are remains of some features associated
with the manorial complex. These include remains of ditches which divided
the area into enclosures possibly for horticulture and ponds which would
have been used as fishponds.


All standing buildings, fence posts, gates and all made up surfaces are
excluded from the scheduling; although the ground beneath these features
is included.

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


This list entry was subject to a Minor Amendment on 05/12/2011

Legacy

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

Legacy System number:
35496
Legacy System:
RSM

Sources

Books and journals
Neave, D, Turnbull, D, Landscaped Parks and Gardens of East Yorkshire, (1992), 31-32
Neave, D, Turnbull, D, Landscaped Parks and Gardens of East Yorkshire, (1992), 31-32
Neave, S, Ellis, S, An Historical Atlas of East Yorkshire, (1996), 32, 54

Legal

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 Culture, Media and Sport.

Ordnance survey map of Two moated sites and associated features 520m north of Grimston Garth

Map

This map is for quick reference purposes only and may not be to scale. This copy shows the entry on 08-Jun-2026 at 03:19:00.

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© Crown copyright [and database rights] 2026. OS AC0000815036. Use of this mapping is subject to Terms and Conditions.

End of official list entry

All text content is available under the Open Government Licence v3.0 , except where otherwise stated. Any supplied maps are © Crown Copyright [and database rights] 2026 OS AC0000815036 and may not be reproduced without permission.

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