The Presidential Republic (Spanish: República Presidencial) is the period in the history of Chile spanning from the approval of the 1925 Constitution on 18 September 1925, under the government of Arturo Alessandri Palma, to the fall of the Popular Unity government headed by the President Salvador Allende on 11 September 1973. The period spans the same time as the "Development inwards" (Desarrollo hacia adentro) period in Chilean economic history.