Abstract: A dome structure is provided which is constructed of identical ring-shaped elements of arbitrary size relative to the radius of the dome, the ring elements extending along four or five meridian lines that pass through the zenith of the dome and with additional elements positioned in curved rows lying progressively further from the zenith and with each element attached at its periphery to four other elements. The elements are constructed with tapered peripheries to lie solidly against one another, and with radially extending ribs that prevent deformation of the ring members into an oval shape.