An Inventory of the Historical Monuments in City of York, Volume 2, the Defences. Originally published by Her Majesty's Stationery Office, London, 1972.
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'Plate 2: York Castle, Clifford's Tower and Castlegate Poster. Motte and Clifford's Tower', in An Inventory of the Historical Monuments in City of York, Volume 2, the Defences, (London, 1972) pp. 2. British History Online https://www.british-history.ac.uk/rchme/york/vol2/plate-2 [accessed 25 April 2024]
York Castle: Clifford's Tower and Castlegate Postern. Motte and Clifford's Tower.
Clifford's Tower and Castlegate Postern. Engraving by F. Place, c. 1680.
Motte and Clifford's Tower from S., 1957. 11th-century and c. 1250.