Agustín Nieto Caballero (1889–1975) was a Colombian pedagogue who, in 1914, founded Gimnasio Moderno, a prestigious a private all-male traditional and liberal, primary and secondary school located in Bogotá, Colombia. It was founded in 1914 by various Colombians following the leading initiative of Agustín Nieto Caballero and co-founders José María Samper Brush, Daniel Samper Ortega, Tomás Rueda Vargas, and Ricardo Lleras Codazzi, freethinkers. The school is considered to be the oldest new school in South America (source?) in a time were education was dominated by the Church-ruled Catholic schools. Mr. Nieto Caballero was the preceptor of illustrious Colombians that studied at Gimnasio Moderno.
