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Sleaford Castle today

England · Ruin

Sleaford Castle

Sleaford Castle is a medieval episcopal castle in Sleaford, Lincolnshire, built in the early 12th century by the Bishop of Lincoln. It was a quadrilateral stone castle with square corner towers, a high central keep and a substantial gatehouse; it remained habitable into the mid-16th century. Today almost all above-ground masonry is gone and the site survives as earthworks, a moat and a small toppled fragment of wall in the inner bailey.

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Photograph via Wikimedia Commons

Its prime

1541

Today

Ruin

As it stood in 1541

What Sleaford Castle looked like in its prime.

A rectangular, quadrilateral stone castle set on flat fenland surrounded by a broad water-filled moat and low earthwork banks. Straight curtain walls link square, projecting corner towers to a tall central keep that rises above the inner bailey. A substantial rectangular gatehouse fronts the entrance with a wide gate passage. To the south a long tithe-barn footprint lies within the outer enclosure; the river and dam with a mill sit beside the outer defences.

Its story

The story of Sleaford Castle.

Sleaford Castle was built by the Bishop of Lincoln in the early 1120s, a quadrilateral stone castle with square corner towers, a high central keep and a substantial gatehouse. Two English monarchs are known to have stayed here: King John, and Henry VIII, who visited twice, once in 1541 with his queen Catherine Howard, and held a State Council at the castle.

The castle passed to the Duke of Somerset in 1544, was confiscated by the Crown in 1546, and continued its decline under the ownership of the Carre family. Still habitable as late as 1555, it fell into disrepair during the latter half of the 16th century.

Almost all the above-ground masonry is now gone: the site survives as earthworks, a moat, and a small toppled fragment of wall in the inner bailey.

Step inside

8 places to explore in 1541.

The record describes 8 distinct spots at Sleaford Castle, including 1 interior: gatehouse passage with portcullises. Create your own photoreal reconstruction and explore every one, more scenes means more rooms, more angles, and more of the place to stand in.

Exterior approach across earthworksGatehouse exterior and forecourtGatehouse passage with portcullisesCurtain wall walkway between square towersCentral keep from the inner baileyInner bailey courtyardNorth-east inner bailey, small toppled wallTithe barn precinct and river mill

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Whose castle

Clans who held Sleaford Castle.

The families that held Sleaford Castle for a decade or more across its history, follow a name to its clan.

  • Carre

    Owned by the Carre family as the castle declined in the later sixteenth century.

Nearby

Landmarks within reach of Sleaford Castle.

Belton House, EnglandMuseumBelton House15 km awaySincil Bank, EnglandStadiumSincil Bank26 km awayLincoln Cathedral, EnglandCathedralLincoln Cathedral28 km away

Questions about Sleaford Castle

What is the history of Sleaford Castle?

Sleaford Castle was built in the early 12th century as an episcopal castle by the Bishop of Lincoln. It became a major episcopal stronghold and agricultural centre, and hosted King John and Henry VIII. The castle passed to the Duke of Somerset in 1544, was confiscated by the Crown in 1546, and declined under the Carre family.

What is inside Sleaford Castle?

Sleaford Castle had a gatehouse passage with portcullises. The castle’s principal internal spaces included the inner bailey courtyard and the outer enclosure, which contained a long tithe-barn footprint. Almost all above-ground masonry has disappeared, leaving these spaces understood mainly through earthworks and surviving remains.

Why was Sleaford Castle built, and what was it used for?

Sleaford Castle was built as a bishop’s manor house, stronghold and agricultural centre. It served the Bishop of Lincoln’s estates and remained a residence and administrative focus for most of its life. Although defensible, it never withstood an armed attack or siege.

Where is Sleaford Castle?

Sleaford Castle is in Sleaford, Lincolnshire. It stands on flat fenland beside the River Slea, with the river, a dam and a mill beside the outer defences. The site is associated with the town of Sleaford in the administrative territory of Sleaford.

When was Sleaford Castle built?

Sleaford Castle was built in the 12th century. The site’s history places its construction in the early 1120s, while the detailed account dates the building between 1123 and 1139. Alexander de Blois, Bishop of Lincoln from 1123 to 1147, built the castle.

Was Sleaford Castle ever attacked or besieged?

Sleaford Castle was never subjected to an armed attack or siege. The nearest it came to one was when Bishop Alexander handed its keys to King Stephen after Stephen’s siege of Newark Castle, and when its bishop handed them to Edward II in the 1320s. The castle did not fall in either episode.

Which family or clan held Sleaford Castle?

The Carre family held Sleaford Castle as it declined in the later sixteenth century. The castle began falling into disrepair during the second half of that century, and its decline continued under the Carre family’s ownership.

What did Sleaford Castle look like in its prime?

Sleaford Castle was a rectangular, quadrilateral stone castle on flat fenland, surrounded by a broad water-filled moat and low earthwork banks. Straight curtain walls joined square projecting corner towers to a tall central keep, while a substantial rectangular gatehouse faced the entrance.

Is Sleaford Castle still standing, or is it a ruin?

Sleaford Castle is a ruin. Almost all its above-ground masonry has gone, and the visible remains are a moat, associated earthworks and a small toppled fragment of wall in the north-east corner of the inner bailey. The site is also a scheduled monument and Grade II listed building.

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