stronghold (noun) /ˈstɹɔŋˌhoʊld/
1
A place built to withstand attack; a fortress.
2
(figurative) A place of domination by, or refuge or survival of, a particular group or idea.
A place built to withstand attack; a fortress.
(figurative) A place of domination by, or refuge or survival of, a particular group or idea.