The Collaborative International Dictionary of English v.0.48:

Phanar \Phan"ar\ (f[a^]n"[dot]r), n. [Turk. fanar, fr. NGr.
   fana`ri lighthouse, Gr. fana`rion lantern; -- from a
   lighthouse on a point projecting into the Golden Horn.]
   A quarter of Constantinople which, after the Turkish conquest
   of the city, became the chief Greek quarter; hence, the Greek
   officials of Turkey, or phanariots, as a class.
   [Webster 1913 Suppl.] Phanariot