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Certain |
Probable |
Questionable or Doubtful |
Rejected |
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Confidence is a statement of the site as a medieval fortification or palace | ||||
Name |
Alternative Name(s) |
Type |
Remains |
| Alkborough Countess Close | Fortified Manor House | earthwork | Aslackby Preceptory | Temple Farm | Fortified Ecclesiastical site | no visible | Ayscoughfee Hall | Tower House | major building |
| Barrow upon Humber; The Castles | Goxhill; Barrows Castle; Castellum de Barewa | Timber Castle | earthwork | Barton upon Humber Castle | Castle Dyke South; Tyrwhitt Hall | Timber Castle | no visible | Barton upon Humber Town Rampart | Castledyke | Urban Defence | no visible | Belleau Manor | Fortified Manor House | masonry ruins/remnants | Benniworth Castle | Beningwrd' | Timber Castle | no visible | Bishop Norton Manor | Moat Farm; Stowe | Palace | no visible |
| Bolingbroke Castle | Masonry Castle | masonry footings | Boston Town Defences | Urban Defence | cropmark/slight earthwork |
| Bourne Castle | Brune; Brun; Brunne | Timber Castle , Masonry Castle | earthwork | Broughton Castlethorpe, Lincolnshire | Castle Hill | Timber Castle , Masonry Castle | no visible |
| Burton Pedwardine | Timber Castle , Fortified Manor House | earthwork | Caistor Castle Hill | Castor; Castram in Lindesia | Timber Castle | no visible | Casewick Hall, Uffington | Fortified Manor House | masonry footings |
| Castle Bytham | Biham; Bitham | Timber Castle , Masonry Castle | earthwork |
| Castle Bytham Village Defences | Biham | Urban Defence | earthwork |
| Castle Carlton, South Reston | Karleton' | Timber Castle | earthwork | Caythorpe Manor | Cathorp; Cadorpe | Fortified Manor House | cropmark/slight earthwork |
| Corby Glen Motte | Timber Castle | earthwork | Dalby Old Hall Holt | Partney; Parthenai | Timber Castle | cropmark/slight earthwork | Dewy Hill | Dewey Hill | Timber Castle | cropmark/slight earthwork | Dunholme Bishop's Manor | Palace | no visible | Eagle Preceptory | Aycle | Fortified Manor House , Fortified Ecclesiastical site | earthwork | Epworth manor house | Vinegarth | Fortified Manor House | no visible |
| Eresby Manor | Eresby Hall; Heresby | Fortified Manor House | masonry footings | Fleet Motte | Timber Castle | cropmark/slight earthwork |
| Folkingham Castle | Folkyngham | Timber Castle , Masonry Castle | earthwork | Frampton Castle | Framton'; Multon Hall | Fortified Manor House | cropmark/slight earthwork | Friskney Hall | Friskeneye | Fortified Manor House | earthwork | Gainsborough Old Hall | Gainsburgh | Fortified Manor House | major building |
| Goltho Manor | Timber Castle | cropmark/slight earthwork | Grimsby Castle | Grimesbi; Grymesby | Masonry Castle | no visible |
| Grimsby Town defences | Burdyke; Burdike | Urban Defence | no visible | Grimsthorpe Castle | Masonry Castle | masonry ruins/remnants | Halstead Hall | Fortified Manor House | major building |
| Heydour Castle Hills | Haydour | Timber Castle | earthwork | Holme Spinney, Beckingham | Bekingh'm et Sutton | Timber Castle | cropmark/slight earthwork | Horncastle Bishops Palace | Manor House | Palace | no visible | Horncastle Castle | Fortified Manor House | masonry ruins/remnants |
| Hough on the Hill Castle Hill | Hache | Timber Castle | earthwork | Hougham Manor | Fortified Manor House | no visible |
| Hussey Tower | Benyngton Tower; Benyington Tower | Tower House | major building | Kettlethorpe Hall | Fortified Manor House | earthwork |
| Kinaird Castle, Owston Ferry | Kinnards Ferry; Kenefar; Kinardferry; Kinardeferie; castellum apud Kinardeferiam; Axholme; Axiholme; castello de Insula | Timber Castle | earthwork |
| Kingerby Hall | Kynyorby; Kinardbi | Timber Castle | earthwork |
| Lincoln Bishops Palace(s) | Palace | masonry ruins/remnants | |
| Lincoln Castle | Nicole | Timber Castle , Masonry Castle | major building |
| Lincoln Cathedral Close Wall | Fortified Ecclesiastical site | masonry ruins/remnants | Lincoln Cathedral West Front | Remigius' Tower | Masonry Castle , Palace , Fortified Ecclesiastical site | major building |
| Lincoln City Wall | Urban Defence | masonry ruins/remnants | |
| Lincoln siege-works | Siege Work | no visible | Louth Bishops Manor | Palace | no visible | Mablethorpe | Malberthorpe | Fortified Manor House | earthwork |
| Moulton Kings Hall | Kings Hall Park; Quapelode; Whaplode; Muleton' | Timber Castle , Masonry Castle , Fortified Manor House | earthwork |
| Nettleham Bishops Manor | Langworth; Netelham | Palace , Fortified Manor House | earthwork | Newhouse Castle | Newsham; Goxhill | Timber Castle | uncertain | Partney Castle | Parthenai | Timber Castle | uncertain | Redbourne Castle Hills | Timber Castle | cropmark/slight earthwork |
| Rochford Tower | Kyme Tower; Richmond Tower; Skirbeck | Tower House | major building | Scrivelsby Court | Scrivelsby Hall | Masonry Castle , Fortified Manor House | masonry ruins/remnants |
| Sleaford Castle | Lafford; Sleford; Eslaford; Esleford; Sliforde | Timber Castle , Masonry Castle , Palace | earthwork |
| Somerton Castle, Lincolnshire | Masonry Castle | masonry ruins/remnants | |
| South Kyme Tower | Masonry Castle , Fortified Manor House , Tower House | major building | South Witham Templars Preceptory | Fortified Manor House | no visible | Spalding Castle | Talbois Castle; Coney Garth | Timber Castle , Masonry Castle , Fortified Manor House | no visible | Spalding Priory | Spaldyng | Fortified Ecclesiastical site | no visible |
| St Mary's Guildhall, Lincoln | John o'Gaunt's Stables; The King's House | Palace | major building |
| Stainby Tower Hill | Timber Castle | earthwork | |
| Stamford Bridge, Lincolnshire | Fortified Bridge | masonry footings | |
| Stamford Castle | Stanford; Stamforde | Timber Castle , Masonry Castle | masonry ruins/remnants |
| Stamford Town Wall | Stanford; Staunford | Urban Defence | masonry ruins/remnants |
| Stow Bishops Palace | Moat Farm; Stowe | Palace | earthwork |
| Swineshead; The Manwarings | Baythorpe; Manwar Ings; Man War Ings; the Danish encampment; Suineshevede | Timber Castle | earthwork |
| Tattershall Castle | Tateshal | Masonry Castle | major building | Temple Bruer Preceptory | la Bruere; Temple Bruern | Fortified Ecclesiastical site | masonry ruins/remnants |
| Thonock Castle Hills | Gainsborough; Geinesburgo; Thonal | Timber Castle | cropmark/slight earthwork | Thorngate, Lincoln | Tornegat | Timber Castle , Masonry Castle | no visible |
| Thornton Abbey | Fortified Ecclesiastical site , Palace | major building | Torksey Castle | Torkesey | Fortified Manor House | masonry ruins/remnants | Torksey Motte | Windmill Hill; Torkesey Wynde Mille Hille | Timber Castle | no visible |
| Tothill Toot Hill | Timber Castle | earthwork | |
| Tower on the Moor | Woodhall; Tour of the Moore | Tower House | masonry ruins/remnants |
| Trehampton Manor, Lea | Hermit Dam Wood; la Lee | Fortified Manor House | earthwork |
| Welbourn Castle Hill | Welbourne | Timber Castle , Masonry Castle | earthwork | Welton le Marsh Castle Hill | Hanby | Timber Castle | cropmark/slight earthwork | West Butterwick Tower | Botterwic | Tower House | no visible | Withern Castle Hill | Timber Castle | earthwork | Wragby Rout Yard | Timber Castle , Fortified Manor House | earthwork |
| Wrangle Kings Hill | Timber Castle | earthwork | Wyberts Castle, Wyberton | Wells Slade | Timber Castle , Fortified Manor House | earthwork |
| Ancaster | Oncaster; Onkaster; Causennae | Uncertain | earthwork |
| Aslackby Castle | Timber Castle , Masonry Castle , Fortified Manor House | cropmark/slight earthwork | |
| Bayons Manor | Tealby Hall | Fortified Manor House | uncertain |
| Boothby Pagnell Manor | Boutheby | Fortified Manor House | major building |
| Bourne Village Defences | Urban Defence | cropmark/slight earthwork | |
| Broughton Manby Wood mound, Lincolnshire | Timber Castle | cropmark/slight earthwork | |
| Burgh Banks, Old Somerby | Timber Castle | cropmark/slight earthwork | |
| Caistor Town Defences | Castor; Castre | Urban Defence | no visible |
| Castle Carlton Borough Defences | Market Carlton; Karleton | Urban Defence | earthwork |
| Earthwork east of St Helen's Well | Timber Castle | cropmark/slight earthwork | |
| Friskney Abbey Hills | Fortified Manor House | earthwork | |
| Friskney Manor House | Fortified Manor House | earthwork | |
| Gainsborough Park | Lea | Fortified Manor House | cropmark/slight earthwork |
| Grantham Castle | Timber Castle , Masonry Castle , Fortified Manor House | no visible | |
| Grantham Town Defences | Urban Defence | no visible | |
| Haxey | Axey; Axel; Axholme | Timber Castle | no visible |
| Holywell Castle Dyke | Aunby | Timber Castle , Fortified Manor House | earthwork |
| Kingerby Village Defences | Urban Defence | earthwork | |
| Legsby; The Mount | Bleasby | Timber Castle | earthwork |
| Old Skegness Castle | Uncertain | no visible | |
| Old Skegness Town Defences | Urban Defence | no visible | |
| Topclyve | Timber Castle | uncertain | |
| Wainfleet Castle Hill | Timber Castle | no visible |
