House built in 1916–on the other side of this wall is what used to be a “sewing room”, according to my landlord.

the house has about eight bedrooms and was definitely tricked tf out for it’s time period. i can enter the sewing room on the other side, and i’ve looked all around on the floor, where i believe the door would open up to.. but can’t find the backside of the tiny door! it’s painted over, and feels very secure- almost locked. this house has a complex laundry chute system but this seems way too small to be a part of it. this room clearly was built as a bedroom, as there is a bathroom and a closet, neither of which are near this bizarre little architectural feature.