"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" - Adolf Loos
Villa Muller is constructed volumetrically. According to Loos, the house is designed upon different volume of spaces in which the development of the design started from the consideration of the requirements of the activities occurred in different spaces. The difference of levels are defined by the use of stairs connecting to different spaces. It means that his houses are not based on ordinary level-to-level plans. There are no distinct and defined levels in a house, but rather a number of defined volumes connected by stairs. For example, the living room was reached by a sort of trick stairs: one had to ascend and then descend two sets of four steps before arriving at the living room at the end of a hall. This kind of spatial design developed by Loos is named as Raumplan.
