 In 1973 Franco resigned as prime minister – separated from the head of state office since 1966 – due to advanced age and illness, but remained in power as the latter and commander-in-chief.Franco died in 1975, aged 82, and was entombed in the Valle de los Caídos.He restored the monarchy in his final years, being succeeded by Juan Carlos as King of Spain, who, in turn, led the Spanish transition to democracy.