Adolf Loos - Villa Muller:

The Villa Muller is an architectural structure designed in 1930 by architect Adolf Loos. The Villa is located in the Czech Republic's capital city Prague, and has become an innovative landmark of early modernist architecture. The spacial design know as 'Raumplan' is evident in the multi-level facets of individual rooms, indicating their function and symbolic importance. This design can also be seen on the exterior of the building.

"My architecture is not conceived in plans, but in spaces (cubes). I do not design floor plans, facades, sections. I design spaces. For me, there is no ground floor, first floor, etc. For me, there are only contiguous, continual spaces, rooms, anterooms, terraces, etc. Storeys merge and spaces relate to each other."

While others, like Frank Lloyd Wright were attempting to perfect the seamless transition from interior to exterior, Loos was deliberately keeping the public outside and the inside private. His aim was to make the building seem "dumb" on the outside, and only reveal its true wealth on the inside.

The first entry way to the Villa is low, which opens up into a cloakroom area that is generous in space. At the far end a short, modest staircase takes the visitor round a right-angled bend, emerging between marble pillars into the double-height sitting room. The Villa Muller was comprehensively restored in 2000 and is now open to the public as part of the City of Prague Museum.


References:

http://www.galinsky.com/buildings/villamueller/index.htm
http://en.wikipedia.org/wiki/Villa_Muller
The aforementioned quote is a shorthand record of conversation from Adolf Loos in 1930.