born Jan. 27, 1910, Madrid, Spain
died Dec. 7, 1997, Durham, N.C., U.S.
Spanish Mexican engineer and architect.
He immigrated to Mexico in 1939 and began to design and construct buildings there. His ferroconcrete structures are distinguished by thin, curved shells that are extremely strong and economical; his imaginative use of paraboloid barrel-vaulting helped dispel mistaken notions of the limits of this material. Notable works include the expressionistic church of Nuestra Señora de los Milagros in Mexico City (1955), with a hyperbolic paraboloid roof of ferroconcrete only 1.5 in. (3.8 cm) thick.