La Habana Vieja (Old Havana), declared a World Heritage Site by UNESCO in 1982, is the historic center of the city of Havana. It is formed by a harbor and the official center, the Plaza de Armas. There you will find all kinds of picturesque monuments, fortresses, churches, palaces, etc. It is full of authentic architectural treasures from different periods and offers one of the most comprehensive collections of urban buildings in all America. This area of the city alone is home to more than a thousand buildings of historical importance with various examples of distinguished architecture ranging from Baroque to Art Deco.
Unlike typical colonial cities, Havana was developed on not one, but four main plazas: the Plaza de Armas, which was the military and defensive center as it had a fortress and a large courtyard used for military parades; the Plaza de la Catedral, which with its cathedral was used as the religious center; the Plaza Vieja, which was the commercial hub as it housed important markets; and the Plaza de San Francisco de Asís, which was the main point of exportation and importation as it had a port where Spanish ships docked.