Around 1220 CE, eleven monolithic churches carved downward from solid volcanic rock were completed at Lalibela in the Ethiopian Highlands. Commissioned by King Gebre Mesqel Lalibela of the Zagwe dynasty, each church was excavated from a single block of stone, with roofs at ground level and interiors extending up to 12 meters below the surface. The complex includes interconnecting tunnels, drainage channels, and ceremonial passages. The churches served as a substitute pilgrimage site for Jerusalem after Saladin's 1187 conquest and remain an active center of Ethiopian Orthodox worship, representing approximately 40,000 cubic meters of rock removed using hand tools.