We have a home that was built in 1972, it's a beautiful brick ranch style home. we are reduing our walls and floors in the living room and when we took the paneling down we found a hole in the wall! Its was made with the original house, it stands about 3 1/2 feet tall and about 2 feet wide, but why? what was it used for? there are no nail holes or marks to indicate anything being hung or any shelves, so whats it for? please help me figure out why there is a hole in the wall!