bas·tion 
(b
ăs
ch
ən, -t
ē-
ən)
n.1. A projecting part of a fortification.
2. A well-fortified position.
3. One that upholds or defends something, as against neglect or unpopularity: a college that is a bastion of traditionalism. See Synonyms at bulwark.
[French, from Old French bastillon, from bastille, fortress; see BASTILLE.]
bastioned adj.