This fort sits at the junction of the Allegheny and Monongahela rivers - essentially the beginning of the Ohio River. In 1754, the French and British governments were fighting over who controlled the territory in the area. When settlers from Virginia began to build a fort, French Canadian forces chased them out, which is weird, because Canadians are usually so polite. Anyway, they finished the fort, which was nice of them, and named it after the then-governor of New France, the Marquis Duquesne, which was wonderfully thoughtful.