Artillery fortifications (those designed to both resist and mount artillery) date back to the 15th Century with a transitional period of adapted and modified medieval designs and then full blown Italian trace in the 16th Century.
Salses in southern France, a late 15th Century Spanish built transitional fort; medieval in basic plan but built with both resisting and mounting artillery in mind. Note the deep ditch that protects the walls from direct fire, the thick walls capable of mounting cannon, the thick embrasured parapets and outworks.
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