Leonardo Castellani (November 16, 1899 – March 15, 1981) was an Argentine priest, essayist, novelist, poet and theologian. Born in Reconquista, Santa Fe, Castellani was ordained as a Jesuit priest in 1930, he studied Philosophy and Theology in Rome. Back in his country, he worked in the Catholic press and went into politics as a representative of Catholic nationalism. He was among the candidates of the Alianza Nacionalista party for a seat in Congress in the 1946 elections. Between 1946 and 1949 he clashed with his own Society of Jesus, who promptly sent him to a two-year confinement in Manresa (Spain). After his petition to assist his brother's funeral was refused, Castellani escaped from Manresa returning to Argentina. He was then expelled from the order and suspended from his functions