Bosphorus separates two places.
== History ==As part of the only passage between the Black Sea and the Mediterranean, the Bosporus has always been of great importance from a commercial and military point of view, and it remains strategically important today
 Other names used by Herodotus to refer to the strait include Chalcedonian Bosporus (Bosporus Chalcedoniae,    [Bosporos tes Khalkedonies], Herodotus 4

