One More: Vincenti and Fortifications

Fortification designs are fascinating. The early efforts of Bachot are somewhat crude. It seems that subsequent authors were engaged in a process of successive iteration to perfect their designs. Of course, designs had to be tested in actual engagements. In Vauban's time, these experiences were captured in siege journals. Prior to that time, engineers had to wander the earth collecting insight. They were, in essence, the centers of calculation. This model is consistent with Turnbull's thoughts on medieval practice. It may also explain the importance of certain locations such as Malta.