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Bainbridge Roman fort and annexe

A Scheduled Monument in Bainbridge, North Yorkshire

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Latitude: 54.307 / 54°18'25"N

Longitude: -2.0972 / 2°5'50"W

OS Eastings: 393770.65028

OS Northings: 490159.486102

OS Grid: SD937901

Mapcode National: GBR FLSM.RT

Mapcode Global: WHB5N.R0JH

Entry Name: Bainbridge Roman fort and annexe

Scheduled Date: 25 February 1935

Last Amended: 2 December 1998

Source: Historic England

Source ID: 1017920

English Heritage Legacy ID: 28407

County: North Yorkshire

Civil Parish: Bainbridge

Traditional County: Yorkshire

Lieutenancy Area (Ceremonial County): North Yorkshire


The monument includes Bainbridge Roman fort, known to the Romans as
`Virosidum', which is located on the summit of Brough Hill above the
confluence of the River Bain and the River Ure. Remains of a contemporary
field system outside the fort are also included in the scheduling. The fort
occupies a strategically strong position, with extensive views up and down
Wensleydale and controls the principal pass through the Pennines between
Stainmore and the Ilkley/Aire gap. The fort, which is defined by the area on
the top of Brough Hill, measures 91m north to south and 111m east to west
between the crests of the rampart, enclosing an area of 1.01ha. The defences
consisted of a clay rampart which was revetted at the rear and had a wall of
sandstone blocks added to its exterior later. The early clay rampart on the
north side was laced with birch willow and moss. The visible remains of the
fort are of a late Flavian date, AD 90-105, although slightly earlier
occupation is probable. The first phase of the defences included an earth and
timber rampart to which was added the later Antonine (approximately AD 190)
stone wall. The rebuilding of the interior of the fort during the 3rd century
was accompanied by the demolition of the east wall and the construction of an
annexe. A building inscription identifies the annexe as `bracchium
caementicium' (stone built outwork) built under Alfenus Senecio. Rebuilding
across the whole site took place in the late fourth century. Pottery evidence
also suggests that the desertion of the fort was unusually late.
Although robbing has left almost no stonework visible, the rampart survives to
a maximum height of 3.9m at the north west corner. The western section of the
northern rampart survives as an unbroken stony scarp with a maximum height of
2.9m. To the east of this the rampart is less defined, the result of
excavation trial trenching in the late 1920s. On the south side the rampart
has a maximum height of 3.4m and 3.1m at the south west angle. The course of
the fort wall at the north rampart is represented on the surface by a narrow
terrace, 1m to 1.7m wide, breaking the principal external scarp of the
rampart. On the east and south sides it survives as a break of slope, with a
more discernible unbroken terrace, 1.2m wide on the west side.
The ditches of the fort are generally not visible to any great depth but their
course is still recognisable on the ground. To the north and south the number
of potential ditches has been limited by the width of the hill. The northern
defences included two ditches, an inner ditch 5.2m wide and an outer ditch 3m
wide. The outer ditch was short lived and was later filled in and a metalled
road built over it. Part of the inner ditch is now covered by a collapsed
rampart. The southern defences included a single ditch with a width of between
3.5m and 5.6m from the base of the rampart to the counterscarp. The east ditch
has a width of 4.5m with a well defined external counterscarp 0.75m high. On
the west side of the fort are the remains of five ditches, constructed because
of the restricted view beyond this part of the hill. The four outer ditches
were relatively shallow, between 0.9m and 1m deep. These ditches had not been
long in use before they were backfilled with clay and stones. The inner `V'-
shaped ditch, which was 5.5m wide and 2.1m deep, had a drainage channel cut
into the bottom. Two oblong mounds overlie the western ditches. The larger, a
grassy flat topped mound 12.8m by 4m, is surrounded by a ditch 1.5m wide and
is situated near the edge of the natural slope. The other, smaller mound lies
beside the west gate in the inner ditch, itself surrounded by a ditch cut into
the base of the rampart. The nature of these mounds is uncertain, but it is
believed that they might be medieval rabbit warrens, known as pillow mounds.
The four entranceways are opposite each other on a parallel to the ramparts.
The east gate is represented by a break in the rampart 4.9m wide. This was a
fourth century insertion. However, the location of the previous gate is
uncertain. The west gate is marked by a small break in the rampart, although
it has been largely obscured by the building of the mounds. The north and
south gates linked by the via principalis are both clearly defined. The north
gate measures 3.3m internally and the south gate 4.2m, accompanied by a
causeway across the ditch.
The annexe, which dates from the period of Severan rebuilding in approximately
AD 205, has been built on the east side of the monument with dimensions of 99m
north to south by 73m east to west. Excavation here has revealed a granary, a
building with a hypocaust system, (identified as either a mansio or a bath
house) and the line of the rampart with a gate at the north west corner.
The roads from the east and south gates are still traceable. From the east
gate, via the annexe, the road, with a width of 5m, bends slightly as it
crosses the causeway and then continues in an easterly direction to the field
wall. The road from the south gate extends in a south westerly direction
forming a terrace on average 1.5m wide. Towards the base of the hill it forms
a hollow way. On the north facing slopes of Brough Hill are a series of strip
lynchets. These are narrow as the result of the steepness of the hill and are
unevenly spaced and irregular. They extend across the hillscope throughout the
full east-west extent of the monument. On the south side of the hill are a
number of low banks and lynchets forming the remains of a field system with a
possible droveway or track.
One of the earliest references to Bainbridge Fort is Camden in his
`Britannia', first published in 1586. He states that "there are groundworks of
an old fortification about five acres in compass; and under it to the east,
the signs of many houses are yet apparent." Since 1925 Bainbridge Fort has
been subjected to a series of excavations. In 1925 and 1926 R G Collingwood
excavated areas of the fort, including the southern half of the praetoria
(headquarters building), and sacellum (chapel), for the Yorkshire
Archaeological Society. In 1928 J P Droop of Liverpool University trial
trenched the north east angle of the rampart and a section of the road outside
the south gate. The following year he excavated the barracks, parts of the
annexe and a section of the via praetoria (the road running east to west
across the fort) beside the east gate. From 1950 until 1953 excavations inside
the main fort and the northern defences were directed by W V Wade of Leeds
University. The excavations were taken over by B R Hartley in 1956 expanding
the area of excavation to the south east corner of the fort. More of the
annexe was investigated and the headquarters building was excavated. The
excavations were concluded in 1969.
All modern fences and field boundaries are excluded from the scheduling,
although the ground beneath these features is included.

The site of the monument is shown on the attached map extract.
It includes a 2 metre boundary around the archaeological features,
considered to be essential for the monument's support and preservation.

Source: Historic England

Reasons for Scheduling

Roman forts served as permanent bases for auxiliary units of the Roman Army.
In outline they were straight sided rectangular enclosures with rounded
corners, defined by a single rampart of turf, puddled clay or earth with one
or more outer ditches. Some forts had separately defended, subsidiary
enclosures or annexes, allowing additional storage space or for the
accommodation of troops and convoys in transit. Although built and used
throughout the Roman period, the majority of forts were constructed between
the mid first and mid second centuries AD. Some were only used for short
periods of time but others were occupied for extended periods on a more or
less permanent basis. In the earlier forts, timber was used for gateways,
towers and breastworks. From the beginning of the second century AD there was
a gradual replacement of timber with stone.
Roman forts are rare nationally and are extremely rare south of the Severn
Trent line. As one of a small group of Roman military monuments, which are
important in representing army strategy and therefore government policy, forts
are of particular significance to our understanding of the period. All Roman
forts with surviving archaeological potential are considered to be nationally

Bainbridge Roman fort and its annexe survive well and will retain
significant archaeological remains. Excavations have provided important
information on the history and use of the site, confirming that it was an
important military centre for over 300 years. Remains of a broadly
contemporary field system survive well on the northern and southern sides of
the fort and information on their relationship to the fort will be preserved.

Source: Historic England


Books and journals
Camden, W, Britannia, (1586)
RCHME, , Bainbridge Roman Fort, (1994)
RCHME, , Bainbridge Roman Fort, (1994)
Collingwood, R G, 'Proceedings of the Leeds Philosophical and Literary Society' in Excavations at Brough-By-Bainbridge in 1925, , Vol. 1, (1925), 261-284
Droop, J P, Jones, C W, 'Proceedings of the Leeds Philosophical and Literary Society' in Excavations at Brough-by-Bainbridge (1928), , Vol. 2, (1928), 77-85
Droop, J W, Jones, C W, 'Proceedings of the Leeds Philosophical and Literary Society' in Excavations At Brough-By-Bainbridge (1929), , Vol. 2, (1929), 234-245
Droop, J P, Jones, C W, 'Proceedings of the Leeds Philosophical and Literary Society' in Excavations At Brough-By-Bainbridge (1932), , Vol. 3, (1932), 16-27
Hartley, B R, 'Proceedings of the Leeds Philosophical and Literary Society' in Brough-By-Bainbridge, , Vol. 1, (1970), 279
Hartley, B R, 'Proceedings of the Leeds Philosophical and Literary Society' in The Roman Fort at Bainbridge Excavations of 1957-9, , Vol. 9, (1960), 107-131
Wade, W V, 'Proceedings of the Leeds Philosophical and Literary Society' in The Roman Fort At Bainbridge. Excavations Of 1952 And 1953, , Vol. 7, (1955), 153-166
Wade, W V, 'Proceedings of the Leeds Philosophical and Literary Society' in The Roman Fort at Bainbridge, Wensleydale, , Vol. 7, (1952), 1-19

Source: Historic England

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