This StadiumATLAS is a building–type planning guide for the construction of spectator stands in modern sports and event complexes. A methodological comparison of the venues of the FIFA World Cup 2006 in Germany continues into a catalogue of "Technical recommendations and requirements" for the new erection or the modernization of multi–functional sports arenas on the basis of current European building regulations. The main focus lies on all essential and relevant aspects of planning and developing future concepts for the construction of grandstands. Requirements for the building type of "gathering space" have changed significantly within the course of the last decades. Achieving higher convenience for spectators and a better commercial exploitation have become guiding principles for the design of new sports complexes. In this handbook, the principles of building regulations and the guidelines of important sports associations are analyzed and interrelated in order to clarify dependencies and enable critical conclusions on the respective regulations. The StadiumATLAS aims to illustrate the constructional and geometrical effects of certain specifications and to facilitate decision–making for planners and clients regarding important parameters of stadium design.