2007, Michael Chabon, Gentlemen of the Road, Sceptre 2008, p. 132:
... the prison fortress called Qomr, a mound of yellowish brick rising up from the left back of the turbid river, in whose donjon by long tradition the warlord was obliged to lay his head.
1819, Walter Scott, Ivanhoe:
It was a fortress of no great size, consisting of a donjon, or large and high square tower, surrounded by buildings of inferior height, which were encircled by an inner court-yard.