Constructed in the late 1700s of yellow brick, Fort Christiansvaern is the best preserved of the five Danish forts remaining in the West Indies. The fort is a wonderful example of Danish colonial military architecture. Although built for defense against pirate and privateers as well as to ward off slave uprising, its cannons have never known warfare. The fort is built around a small courtyard and includes corner bastions and small dark dungeons. Originally used by the Danish Army the fort later served as a jail and also for religious services.