What philosophy emphasizes that architecture should appear as a natural element of a site?

The philosophy that emphasizes architecture appearing as a natural element of a site is Organic Architecture. This approach promotes harmony between the built environment and the natural world, advocating for designs that integrate seamlessly with their surroundings. Proponents of Organic Architecture, such as Frank Lloyd Wright, believed that architecture should not only coexist with nature but actively reflect its forms, materials, and rhythms.

This philosophy argues for a design process that considers the climate, landscape, and natural features of a location, leading to structures that feel like they belong to the environment rather than imposing upon it. This integral connection is seen as vital for creating aesthetically pleasing, functional, and sustainable buildings. Thus, Organic Architecture's emphasis on natural integration is the core reason it aligns with the concept described in the question.