Caroní River
The fourth and present day city was officially founded in 1764 by Don Joaquin Moreno de Mendoza as San Tomas de la Nueva Guayana, Santo Tomé de Guayana de Angostura del Orinoco, or San Tomé de Angostura, named in honor of its diocese and for its position at the first narrows of the Orinoco River. The Spanish relied on trade from the Dutch colony of Essequibo further down the Caroní River until 1771.