A wall hanging assembly including a wall décor item having a generally horizontally oriented receiving surface and a wall mounting rail. The wall mounting rail having an elongate base portion with a back surface adapted to mount adjacent to a wall and a front surface. The wall mounting rail further having a level receptacle on the front surface and a level carried by the receptacle. The wall mounting rail includes a generally horizontally oriented support lip extending along at least part of the wall mounting rail and arranged to bear against the receiving surface of the wall décor item.