Architecture is basically the design of interiors, the art of organizing interior space.

The quote by Philip Johnson, “Architecture is basically the design of interiors, the art of organizing interior space,” emphasizes his belief that the essence of architecture lies not in external appearances but in how interior spaces are conceived and experienced. Johnson, one of the most influential American architects of the 20th century, shifts the focus from the facade or structure to the spatial relationships and functionality within a building. For him, it is the organization of space—how people move, interact, and dwell—that defines architecture as a meaningful art.

By referring to architecture as “the art of organizing interior space,” Johnson highlights the experiential quality of design. He implies that architecture should be centered on how a space feels and functions for its occupants, rather than on abstract form or stylistic flourishes alone. This view aligns with the idea that buildings are ultimately for human use—they are lived in, worked in, and moved through, and therefore must be designed with purpose, comfort, and flow in mind.

While Johnson was known for bold external designs like the AT&T Building and the Glass House, his interiors often demonstrated a meticulous attention to layout, proportion, and ambience. His statement reflects the architectural philosophy that form follows function, yet elevates it by treating the interior as the heart of architectural experience, not a secondary consideration. The interior space, in his view, is where the interaction between people and architecture becomes most tangible and impactful.

The origin of this quote lies in Johnson’s interviews and writings, where he often reflected on the meaning and purpose of architecture. As a former curator at the Museum of Modern Art and later a practitioner of both modernism and postmodernism, Johnson was deeply concerned with how design engages users. This quote encapsulates his conviction that great architecture is not just about what we see from the outside, but about how we feel and function within.