Charleston’s First Moat

Rediscovering Charleston's Colonial Fortifications

Detail from John Muller's 1757 fortification treatise, The Attac and Defense of Fortified Places Detail from a profile of an earthen entrenchment and ditch, from John Muller’s 1757 fortification treatise, The Attac and Defense of Fortified Places

Earthen walls and moats (or ditches) go hand-in-hand in the history of military architecture, and the same was true in colonial Charleston. At this month’s Walled City lecture, I’ll discuss the evidence—both documentary and physical—of the first system of earthen walls and the associated moat that protected the north, west, and south sides of Charleston from late 1703 to ca. 1734. Very little information about these walls survives, but we can attempt to fill in the blanks in our knowledge by taking lessons from the fortification textbooks of the late seventeenth and early eighteenth centuries. Such textbooks, including those published by John Muller in the 1740s and 1750s, provide instructions for laying out all sorts of fortifications, and provide very useful formulas and tables for calculating the height, breadth, and slope of walls, as…

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