Why was the Guggenheim Museum designed with a spiral ramp instead of separate floors?

Frank Lloyd Wright designed the Guggenheim Museum with a spiral ramp instead of separate floors to realize his ideal of a continuous, unified space.1

By replacing traditional, segmented floor levels with a single, spiraling ramp, Wright created an innovative gallery experience where visitors could move fluidly through the building. The design allows for a promenade of art along the curved walls, encircling an open central space illuminated by a glass dome. This approach represented a radical departure from conventional museum architecture, reflecting Wright’s commitment to "organic architecture" and his desire to create a dynamic, expressive environment that harmonized with its purpose.123