Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Paris, Banks of the Seine' has mentioned 'Fortification' in the following places:
Occurrence Sentence Text Source
Fortification of the xc3x8ele de la Citxc3xa9 failed to avert sacking by Vikings in 845, but Paris' strategic importancexe2x80x94with its bridges preventing ships from passingxe2x80x94was established by successful defence in the Siege of Paris (885xe2x80x9386), for which the then Count of Paris (comte de Paris), Odo of France, was elected king of West Francia.