Which architectural term describes a semicircular space above a doorway or window?

Which architectural term describes a semicircular space above a doorway or window?

• A. Oculus
• B. Lunette
• C. Pantograph
• D. Orthogonals

Answer: (B)

A semicircular space above a doorway or window is called a lunette. The term specifically describes that half-moon shape, often used for a small window or decorative panel set over the opening. This distinguishes it from an oculus, which is a full circle, usually a round opening in a wall or ceiling. The other options don’t fit because pantograph refers to a mechanical device for copying drawings, and orthogonals are lines used in perspective drawing, not architectural features above doors or windows. So the semicircular form over the opening is a lunette.