Plan of Fort Duquesne
"Plan of Fort Duquesne," c.1754-1758. The French built the first substantial fort on the point at the Forks of the Ohio, now modern Pittsburgh and the location of Fort Pitt. Named for the Marquis de Duquesne, Governor of New France, the fort was declared not "worth a straw" but defied all British attempts to capture it for more than four years.
Cliché Bibliotheque nationale de France, Paris