What, exactly, is a Clerestory Window?

Clerestory windows are a type of window found in the upper part of a building’s wall, typically in a row just below the roofline. These windows have been used in architecture for centuries and serve various purposes, including providing natural light, ventilation, and aesthetic appeal.

The history of clerestory windows can be traced back to ancient times. In ancient Egypt, temples and palaces often featured high, narrow windows located in the upper portions of walls. These windows allowed light to enter the interior spaces while maintaining privacy and security. The concept of clerestory windows was later adopted by other civilizations, including the Greeks and Romans, who incorporated them into their monumental structures and basilicas.

During the medieval period, clerestory windows became a prominent feature of Gothic architecture. Gothic cathedrals, such as Notre-Dame de Paris and Chartres Cathedral, showcased magnificent stained glass clerestory windows. These windows not only illuminated the interiors with colorful light but also depicted religious narratives and figures, conveying theological messages to the viewers.

In Renaissance architecture, clerestory windows continued to be used, although the style shifted towards a more classical approach. Buildings like St. Peter’s Basilica in Rome and the Florence Cathedral utilized clerestory windows to enhance the grandeur of the spaces and introduce daylight into the interiors.

Clerestory windows experienced a resurgence in popularity during the modern era, particularly in the 20th century. Architects like Frank Lloyd Wright incorporated clerestory windows into their designs as a way to bring abundant natural light into their buildings. Wright’s famous works, such as the Unity Temple and Fallingwater, showcased the effective use of clerestory windows to create well-lit, airy spaces.

Today, clerestory windows can be found in various architectural styles, ranging from traditional to contemporary. They are commonly used in public buildings, religious structures, galleries, and residential homes. Clerestory windows provide several benefits, including increased daylighting, reduced reliance on artificial lighting, improved ventilation, and a sense of openness and spaciousness.

In addition to their functional advantages, clerestory windows also contribute to the aesthetic appeal of a building. They create visual interest, add verticality to the architecture, and allow for the integration of decorative elements, such as stained glass, mullions, or tracery.

Overall, the use of clerestory windows in architecture has evolved over time, but their fundamental purpose of bringing light and ventilation into a space has remained consistent. These windows continue to be appreciated for their functional and visual qualities, making them a timeless feature in architectural design.