Why did the Robie House have an unusual hidden entrance?

Frank Lloyd Wright designed the Robie House with a hidden entrance to move away from the traditional, straightforward entryways found in conventional residential architecture. Instead, he intended for the arrival to be a "pathway of discovery," tucking the main door behind the prowlike porch and living room area.1

By obscuring the entrance, Wright created a deliberate experience for visitors: upon passing through the doorway, one enters a compressed foyer before immediately ascending stairs into the expansive, open-concept living and dining area. This design choice was part of his broader Prairie style philosophy, which emphasized horizontal lines, the integration of building and landscape, and the rejection of traditional, compartmentalized home layouts.12