Fort Frontenac, located at the eastern end of Lake Ontario, in Kingston, Ontario, is among the earliest European sites in the Great Lakes Basin. The post was established in 1673 by Count Frontenac, then Governor of New France, as a means of intercepting furs destined for the Dutch and, later, the English merchants at Albany, New York. As the result of ongoing archaeological and historical research, a comprehensive structural history of the post has been developed. As the archaeological investigations have been restricted to the northwest bastion of the fort, that area will serve as the focus of the present review.