donjon, orkeep, Most heavily fortified area of a medieval castle, usually a tower, to which the occupants could retire during a siege. It contained a well, quarters, offices, and service rooms.

What is donjon keep?

keep, English term corresponding to the French donjon for the strongest portion of the fortification of a castle, the place of last resort in case of siege or attack. ... The keep was either a single tower or a larger fortified enclosure.

What is a donjon in France?

Noun. donjon (plural donjons) The fortified tower of a motte or early castle; a keep.