Which term is used for a circular wheel-like window divided into segments by mullions?

• A. Joinery
• B. Clearstory
• C. Diocletian window
• D. Palladian

Answer: (C)

Think of a circular window that looks like a wheel, with mullions radiating from the center to create many wedge-shaped panels. That pattern is called a rose window. It’s a classic Gothic architectural feature where light streams through the colored glass arranged in a circular, spokes-like design. The other terms refer to different window ideas: joinery is the craft of making and fitting the window frames; a clearstory is a high, light-filled window above eye level; a Diocletian window describes a large semicircular window divided into multiple sections by mullions, not a full circle; Palladian windows feature a central arched opening flanked by two smaller ones. So the wheel-like circular window is best described as a rose window.