A door casing is a frame that surrounds a door, covering the gap between the door and the wall. It serves both a functional and decorative purpose, providing structural support to the door and enhancing the overall aesthetics of the room.
Door casings have been used for centuries, dating back to ancient Egyptian and Greek architecture. They are typically made of wood, but can also be crafted from other materials such as metal or plastic. The design and style of door casings vary widely, from simple and understated to elaborate and ornate.