A Monolithic Dome Home With A Texas Motif A Texan’s Dome Home — It consists of 3, interconnected Monolithic Domes. Central dome is 28’ in diameter and 14’ tall. Two slightly larger domes, each 32′ × 14′, flank the middle dome. (Jim Gibbons) Concrete Walkway — Gibbons’ walkway is laid with concrete stones shaped like the state of Texas. (Jim Gibbons)