[1] In 1960 he founded the Cartagena International Film Festival, in the company of a group of businessmen and personalities from the cultural world of Cartagena, by initiating a series of contacts with the International Federation of Film Producers Associations through the Colombian Embassy in Paris.
[1] To organize the Film Festival, he made the most of the historical, tourist and natural advantages that the Caribbean city offered, with the support of the Colombian government.
He served as director of the Cartagena Film Festival for 48 years, despite failing health during his later life.
Due to ill health, Nieto hired appointed managers to run the basic operations and preparations for the festival.
[1] He is survived by his wife, Mary Luz Milanes de Nieto, two sons, Martín and Gerardo,[1] and several grandchildren This Colombian biographical article is a stub.