Josef Frank's Villa Beer, designed and built between 1928 and 1930, constitutes one of the most complete and sophisticated investigations of the possibilities of the new spatial planning ideas that emerged just prior to and after World War I. Like his Viennese contemporary Adolf Loos, Frank developed his own individual spatial planning strategy, which was based on differentiated room levels and heights, open circulation spaces and galleries, and open stairwells, terraces, and landings. This article examines the genesis and development of Frank's concept of "The House as Path and Place" and its expression in the Villa Beer, comparing Frank's approach with Loos's notion of the Raumplan and Le Corbusier's plan libre. By carefully establishing the linkages between the interlocking volumes in the house, Frank was able to produce a dynamic version of the Raumplan, one that fostered a powerful and affective experience of space.