    Sentence. 1: What: fortification. was  builtin: the. 19th’ century after the.  detéat. of the November Uprising?    Sentence 2: The Warsaw. Citadel, an  impressive:. 19th-century. ‘fortification.  built: after the defeat. : of: ‘the:  -November ‘Uprising,::was.' a place of  martyr. for the Poles.