Spanish Fort is a term used to refer to a type of fortification that was popular in the Spanish colonies during the 16th and 17th centuries. The two main components of a Spanish Fort were the PRESIDIO, which was a fortified military base, and the Alcazar, which was a fortified palace or castle. The PRESIDIO was typically made up of a walled enclosure with several towers, while the Alcazar was usually a large building with thick walls and multiple levels. Together, these two components provided a strong defensive structure for the Spanish colonies.