theme music

i've been annoyed that i don't know this for AGES! there's a piece of music, played on the pipe organ, that i associate with dracula films and old horror films in general of the 30's thru 50's. at the beginning it's one melody line - it's annoying i don't know whether i can post audio clips here... i'm looking for the sheet music and for that i need to know the name of the piece!
can anyone help me?

[mictlan]

Is is Bach's Toccata and Fugue in D Minor? That's the one that is in (among other things) Fantasia.

There's a MIDI version here.