Abstract: A circular building structure includes a floor, a cylindrical wall extending upwardly from the floor, and a roof mounted on top of the cylindrical side wall. The roof is constructed of a plurality of roof beams which are supported by and extend radially and upwardly from a perimeter of the cylindrical wall toward the center to form a peak having a cylindrical beam tube disposed therein. A plurality of flanges are attached to an outer wall of the beam tube to support the upper inner end of each roof beam and brackets are mounted to the top of the side wall to support the lower ends of the roof beams. A circular band extends around the perimeter of and is attached to the upper end of the circular wall. The structure may be elevated above ground level and a walkway constructed all around the perimeter thereof at a floor level.