Cover it with artwork, a bulletin board, chalk board or message board.

I don't understand...is there still power to the thing or is it completely dead? If it's completely dead, remove it and then sheetrock over it. If it still has power, then it can't be enclosed.

Ours was removed when we redid our power 25 years ago. You'd never know it had been there.

Jenna, I think this should be asked in the Old House Forum. The talk about things like this

If there is no live wire coming into the box, it can be removed and drywall end over as Annie suggested. A few years ago we upgraded our electrical service from 200 to 400 amps and there was some discussion about moving the panel, which was located in the laundry room. We decided to leave it in place and just put the second one next to it, but if we had moved it they would have taken out the box so the wall could be repaired.

Perhaps there is still a live connection to your old box? I would ask the electrician this first. If he doesn't know or give a definitive answer you can have your electric utility send out someone to check. They would have had to inspect the work before the connection was changed.

The old fuse box remains in our 1940s breakfast area. You can just glimpse it in this photo on the far wall - the white "thing" up high on the wall behind the chandelier. The inner workings are all still intact, but it now serves no actual purpose as we have a new fuse box elsewhere. As it has a wooden door, I just painted it to match the rest of the trim and left it and I don't even notice it now. Yours may be a metal door, though, and I know I wouldn't find that as "charming." Can you possibly drywall over it or hang something to disguise it, as has been suggested?

Mine is inside a cupboard. I'd post a picture but it is a mess in there. Mine is the circuit breakers for the house.

It depends on how they rewired.

Often when you do an upgrade where there is a fuse box, new circuits are run to the new breaker box and AND the old circuits are passed through the old fuse box (with a HUGE fuse) to breakers in the new box.

If they did that, you can't drywall over the box.