when i moved to this apartment, the wooden wardrobe i had in previous one (built on the spot) could eventually move through that door and corners but absolutely could not move through this doors/corridors/corners (or staircase). So.. i got a power-jigsaw and cut it into upper and lower halves. Those moved easily. Then "assembled" them halves with lots of metal planks and screws on the new spot. Tadaa...

Luckily it was wooden.