This document outlines the basic and modifying elements of architecture that contribute to defining spaces. The basic elements include defined areas, platforms, pits, markers, focuses, barriers, roofs, supports, paths, and openings. Modifying elements that alter the experience of these spaces include light, color, temperature, ventilation, sound, smell, texture, scale, and time. Together, the basic architectural structures and how they are modified create varied places with unique atmospheres defined by both physical and sensory qualities.