Philip Marlowe is a fictional character created by Raymond Chandler in a series of novels including The Big Sleep, Farewell, My Lovely and The Long Goodbye.
His office, originally on the 7th floor of an unnamed building in 1936, is at #615 on the sixth floor of the Cahuenga Building by March/April 1939 (the date of Farewell, My Lovely), which is on Hollywood Boulevard near Ivar.