Four 1773 Georgian Prints: Fortification Plates CXXVII, CXCVII, CXCVIII, CXCIX

Four Georgian engravings, matted to 10 7 3/8 and presented on a single large mat (25 1/4 x 19 1/4). This group of prints illustrates well the use of star shaped fortifications, which became the standard in response to the extensive use of artillery beginning in the 15th century. Also pictured are diagrams of a catapult and a rather crude ballista, an example of a keep with several curtain walls, and a diagram of the foundation of a typical wall.