lucarne

In architecture, a lucarne is a small dormer window that projects from a sloping roof, typically to illuminate a room, often a bedroom. The term "dormer" itself comes from the Latin word dormitorium, meaning "sleeping room".1

Lucarnes can have various roof styles, including gabled, hipped, or flat. While simple dormers are common in some regions, more elaborate designs emerged during the late Gothic and Renaissance periods, sometimes extending from the wall line and featuring rich decoration. These architectural elements have been used consistently through centuries and remain popular in revival-style buildings.1