tower keep

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keep, donjon

The stronghold of a medieval castle, usually in the form of a massive tower, and a place of residence, esp. in times of siege.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
From the 90ft tower keep there are views to Orford Ness, a 10- mile shingle spit, now a nature reserve.
"I will need a lot of luck, but as long as those horses such as Passage Of Time, Multidimensional and Phoenix Tower keep sound and the three-year-olds like Twice Over and Kandahar Run materialise, there is a lot to look forward to."
The massive ruins of Henry II's 12th Century tower keep, set within the earthworks of a Roman fort guarding the strategic Stainmore pass over the Pennines, is a subject which would have captured Turner's imagination.