Nicolás Dionisio Castellanos Rivero (December 6, 1911 in Limonar, Cuba – February 10, 1985) was a Cuban politician and mayor of Havana from 1947 to 1952. Castellanos was the president of the Havana City Council until succeeding Manuel Fernández Supervielle as mayor. He was a member of the Authentic Party when taking the mayoral position. He was married to Laudelina Fernández Castellanos and had three children. Castellanos and his family left Cuba after the Cuban Revolution.
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