Corner defense with flankers

Corner defense with flankers

Inv. 9089
Interpretation by Ermenegildo Menighetti, 1952 - 1953

Leonardo drew this cylindrical tower after having observed and described several times the fortifications realized by Bartolomeo Gadio at the castle of Milan. It perhaps represents, along with a very similar drawing in the Codex Atlanticus, a study for a new fortification of the castle at Pavia. The model represents a section of a fortification with escarpment and moat. The corner tower is based on a circular plan for better resistance against bombard strikes. It is shown in section demonstrating the internal arrangement of the embrasures and chambers for the artillery, and the double spiral access stairways (the double snail, as Leonardo called them). The embrasures are characterized by the presence of two trapezoidal loopholes for firearms, one for protecting the outer walls with grazing fire, other for protecting the inner corridors.

The model is based on the drawing:

  • Manuscript B f. 69 r. (1487-1490)
    Paris, Institut de France