A building uses three or more triangular facades arranged in a serial array formed by one triangular facade jutting from side face boundaries of each of the abutted and side-by-side triangular facades. The triangular facades configured similarly are in a dispersed serial arrangement about an elongated central axis. One triangular facade is the larger of triangular facades and all facades have a triangularly shaped outer facing wall bounded by an endless succession of perimeter walls in a right triangle relation. The arrangement permits multiple triangular facades configured to harmonize with level or undulating terrain.