What is a hypaethral structure?

A hypaethral structure refers to a design characterized by being partially open to the sky. This architectural term is often applied to buildings or spaces that have an open ceiling or a roof that allows light and air to flow in from above. Historically, this type of construction has been used in various cultures, particularly in ancient Greek temples.

The significance of a hypaethral structure lies in how it connects the interior space to the natural elements outside, fostering a feeling of openness and bringing a sense of the environment into the architectural experience. For example, in ancient temples, open-air elements like the hypaethral court served both spiritual purposes—allowing the worship of deities in the presence of the sky—and functional purposes—providing ventilation and lighting to the building.

Other types of structures—such as fully enclosed buildings or underground facilities—do not share this characteristic of openness, nor do structures designed primarily for defense, which focus on protection rather than connection to the outside environment. Thus, the defining quality of a hypaethral structure is its partial exposure to the sky, enhancing the relationship between architecture and nature.