👉 Fenestrae, in architectural terminology, are openings or openings that open up and allow light to enter a space. They can be found on windows, doors, walls, and ceilings, often used for ventilation, air circulation, and decorative purposes. In architecture, fenestrae can also refer to the glass panels of windows, which are typically used in residential buildings as they provide privacy and protection from strong winds, light pollution, and harsh weather conditions.