The word “empyrean” relates to the sky and/or heaven. It comes from the Ancient Greek empyros, meaning “in the fire”. (“Pyre” and “pyromania” stem from empyros too.) The Empyrean, a.k.a. the firmament or the highest heaven, was the domain of fire, according to ancient beliefs. What’s all this got to do with Century City? Simply put: streets here have celestial names. See Constellation Boulevard.