Squint Shot 061610

Here's a puzzle . . . at least for me. Is this an old doorbell system or was this a light switch. The wiring starts at a doorframe. This door is on the second floor of what used to be The Decorating Center, and before that Woods Drug Store. There is a stairway access from the street level on East Grand River up to this door. As you will see in the three pictures, the wiring goes from the doorframe, up to the ceiling, and over to the center of the room. I'm assuming that makes it a light switch at the door . . . but there is no light fixture. Any guesses?