A city in northwestern Germany on the Rhine River
From Latin Colonia Agrippina, Agrippine Colony, a settlement founded by Agrippina, the mother of Roman Emperor Nero; from Latin colonus, ultimately from Proto-Indo-European *kwel.
Cologne's airport code is CGN.
Cologne is also home to Evoke, the Soma Festival, Summerjam and Open Chaos
For the usage as perfume see:
Eau de Cologne (French for "water of Cologne", Kölnisch Wasser in German) is a type of light perfume that originated in Cologne, Germany and is defined by its typical concentration of about 2-3% essential oils. Today only used by old ladies and Japanese tourists as souvenir from Cologne ;-)