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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 |
| Anstey Castle | Anstey Hall; Anestie; Anesty | Timber Castle , Masonry Castle | masonry footings | Anstey Village Defences | Urban Defence | earthwork |
| Ashridge palace | Ashridge House | Palace | masonry ruins/remnants |
| Benington Castle | Bennington; The Lordship; Benyngton; Beningtuna; Turrim de Beninton' | Timber Castle , Masonry Castle | masonry footings |
| Berkhamsted Castle | Berkhampstead; Berkhamstead; Great Berkhamsted; Berchamstede; Berghhamsted | Timber Castle , Masonry Castle | masonry ruins/remnants | Berkhamsted siegeworks | Siege Work | earthwork | Buckland moat | Timber Castle , Fortified Manor House | earthwork | Bygrave House | Fortified Manor House , Palace | earthwork | Clothall Castle | Timber Castle , Fortified Manor House | earthwork | Hadham Hall | Palace , Fortified Manor House | major building |
| Hatfield Old Palace | Palace | major building | |
| Hertford Castle | Hartford | Timber Castle , Masonry Castle , Palace | masonry ruins/remnants | Hertford Town Defences | Urban Defence | no visible |
| Hunsdon House | Honesdon; Hunsdon Tower; Turris manerij de Howndesdon | Fortified Manor House , Palace , Tower House | masonry ruins/remnants | Kings Langley Hunting Lodge | Little London | Palace | earthwork | Kings Langley Royal Palace | Palace | earthwork | Kingsbury Castle, St Albans | Castro de Kyngsbury; Kyngisbiri | Timber Castle , Palace , Urban Defence | cropmark/slight earthwork | Little Gaddesden Church Meadow earthworks | Timber Castle , Fortified Manor House | cropmark/slight earthwork | Much Hadham The Palace | Bishop's Folly | Palace | major building | Periwinkle Hill, Barkway | Periwinkle Hall; Reed | Timber Castle | cropmark/slight earthwork |
| Pirton Toot Hill | Timber Castle | earthwork | Pirton Village Defences | Urban Defence | cropmark/slight earthwork |
| Rickmansworth; The More | Manor of the More; Rykmersworth; Moor Park | Palace , Fortified Manor House | no visible |
| Rye House, Stanstead Abbots | Fortified Manor House | major building | |
| St Albans Abbey | Great Gatehouse | Palace , Fortified Ecclesiastical site | masonry ruins/remnants | St Albans Town Defences | Monk Ditch | Urban Defence | no visible | Standon Lordship | The Lordship | Fortified Manor House | masonry ruins/remnants |
| Therfield Castle | Tuthill | Timber Castle | earthwork | Therfield Village Defences | Urban Defence | earthwork | Tyttenhanger Palace | Tyttenhangar; Tytenhanger | Palace | no visible |
| Walkern Bury | Bassus Green | Timber Castle , Masonry Castle | cropmark/slight earthwork |
| Waytemore Castle, Bishops Stortford | Weytemore; Storteford; Estorteford | Timber Castle , Masonry Castle , Palace | masonry footings | Well and Chapel Woods, Watton | Danesfield | Timber Castle , Fortified Manor House | earthwork | Widford Barrow Hill | Timber Castle | earthwork |
| Wymondley Castle | Great Wymondley | Timber Castle | earthwork |
| Anstey Hales Farm | Hales Hill | Timber Castle , Fortified Manor House | earthwork |
| Ardeley Bury moated site | Timber Castle , Fortified Manor House | earthwork | |
| Barrowfield, Great Amwell | Gallows Plain | Timber Castle | earthwork |
| Benington Village Defences | Bennington | Urban Defence | earthwork |
| Brent Pelham, Cole Green | Timber Castle | earthwork | |
| Broxbourne Manor of the Bishop of London | Palace | no visible | |
| Danesbury, Hertford | Warren Field; Port Hill | Timber Castle | cropmark/slight earthwork |
| Golden Parsonage, Great Gaddesden | Timber Castle | earthwork | |
| Great Munden | Roughground Wood; Levens Green | Timber Castle | cropmark/slight earthwork |
| Hoddesdon Bury Cock Lane mound | Broxbornebury Park; Hoddesdonbury | Timber Castle | earthwork |
| Little Hadham, Cailes Castle | Uncertain | cropmark/slight earthwork | |
| Little Hadham, North of Hadham Hall | Timber Castle | earthwork | |
| Nuthampstead; The Warren | Timber Castle | cropmark/slight earthwork | |
| Pains End, Anstey | Fortified Manor House | earthwork | |
| Pirton Grange | Fortified Manor House | major building | |
| Preston Castle, Hertfordshire | Castle Farm | Masonry Castle | no visible |
| Rennesley Garden Wood, Hertfordshire | Rennesley Gardenwood; Wadesmill; Standon | Timber Castle | cropmark/slight earthwork |
| Sandon; The Mount | Timber Castle | earthwork | |
| Totteridge Manor of the Bishop of Ely | Palace | earthwork | |
| Wheathampstead | Castle Meadows; Creswell Farm | Timber Castle | no visible |
