Alnwick
Castle,
Alnwick
Auckland
Castle, Bishop Auckland, Co. Durham
Aydon
Castle, Corbridge, Northumberland. A Fortified manor
Bamburgh
Castle, Bamburgh, Northumberland
Barnard
Castle, County Durham
Bowes
Castle, Bowes, Teesdale,
Brancepeth
Castle, Brancepeth, County Durham
Chillingham
Castle, Chillingham, Northumberland
Dunstanburgh
Castle, Craster, Northumberland
Durham
Castle
Edlingham
Castle, Edlingham, Northumberland 14th century ruins.
Elsdon
Tower, Elsdon, Northumberland Pele Tower
Etal Castle,
Etal, Northumberland 14th century
Hotspur
Gate, Alnwick, Northumberland
Hylton
Castle, Sunderland, Tyne and Wear
Lindisfarne
Castle, Holy Island, Northumberland
Morpeth
Castle, Morpeth, Northumberland Remains only
Newcastle
Castle
Norham
Castle, Norham-on-Tweed, Northumberland
Preston
Tower, Chathill, Northumberland 14th century Pele
Prudhoe
Castle, Prudhoe, Northumberland Ruined (12th century)
Raby
Castle, Staindrop, County Durham
Richmond
Castle, Richmond, North Yorkshire 12th century keep
Tynemouth
Castle and Priory, Tynemouth
Wark Castle,
Wark-on-Tweed, Borders Ruin
Warkworth
Castle, Warkworth, Northumberland
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more about Border history in the Timeline