Castillo de San Marcos
September 4th 2014 Castillo de San Marcos
Castillo de San Marcos is the United States oldest masonry fort. It is an example of the "bastion system" of fortification. The "bastion system" was developed the first quarter of the 16th century in northern Italy and it was the dominant fortress design for 300 years. The design used angled bastions that provided no dead ground where an
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