The Castillo San Felipe de Barajas is a fortress in the city of Cartagena, Colombia. The castle is located on the Hill of San Lázaro in a strategic location, dominating approaches to the city by land or sea. It was built by the Spanish during the colonial era. Construction began in the year 1536, and it was originally known as the Castillo de San Lázaro, It was expanded in 1657.