In order to understand the original phenomena of architectural space, the systems for the definition and division of the inside space of primitive tent houses of old Eurasian peoples are studied. The radial system from central fireplace, the depth from the entrance door and the polarity of right and left from the deepest corner of the inside space are three original moments of the space definition and division of these houses. And the similar system can be found in the Stubeof northeast and central European farmhouses.
