The First Portuguese Republic spans a complex 16-year period in the history of Portugal, between the end of the period of constitutional monarchy marked by the 5 October 1910 revolution and the 28 May coup d'état of 1926. The last movement instituted a military dictatorship known as Ditadura Nacional (national dictatorship) that would be followed by the corporatist Estado Novo (new state) regime of António de Oliveira Salazar.