Earth, the space that hosts the humankind, is a field of action and experimentation to find shelter, food and a way to satisfy survival and well-being practices. The majority of living organisms, when they begin to realize the nature of the environment they are called to live in, set as their primary and immediate goal the search for a place of protection. It did not take long for the man/woman to evaluate the subsoil as a space that can meet his/her needs. Thus, for thousands of years, the choice for underground creation, construction and adaptation has been visible and reasonable.

In an attempt to understand this choice we are faced with problems of all kinds. The passage of time differentiates the needs of man/woman and the concept of protection shifts from a vital factor of continued existence to one of the many design components of the modern architect.

Initially, the process of producing anything underground encountered technological obstacles while the maker was faced with issues of know-how, materials and time. Today, having developed technologically, the modern designer who deals with subterranean architecture is influenced by issues such as politics (the relationship of a community with its environment), ecology, urban planning, social reactions, aesthetics and economics. A common axis in all times and periods of human activity is the relationship of effort-result and need-possibility. The principles of all forms of construction are based on them, as well as the answers to the question “why?” when one chooses to create below the surface of the earth.