keep

keep

Architecture the main tower within the walls of a medieval castle or fortress

Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

Keep

Inner tower of a castle.

Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

keep, donjon

keep

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.