Nubian masons vault without timber centering
Fathy found that masons in Nubian villages built mud-brick vaults and domes with no wooden formwork, laying courses of brick on an incline so that each brick leaned against and adhered to the last. This removed the need for timber, which Egypt lacked and rural families could not afford, and it put the roof over a poor house back within reach of the family and a local mason.
