| Belfort was fortified by the military architect Vauban, who created an elaborate system of towers, casemates, curtains and counterscarps. |
| Homer mentions such structures at Troy, Thebes, and Calydon, and is also familiar with casemates and battlements. |
| The design of the casemates is similar to the ones found in the southern part of the Maginot Line and photographs of them are often confused with Maginot forts. |
| Just inside these casemates are two 15-inch smoothbore Rodman guns. |
| These vaulted casemates form the main walls of the fort and support the wide gundeck, the roof of the Castillo. |
| There are 142 ouvrages, 352 casemates, 78 shelters, 17 observatories and around 5,000 blockhouses in the Maginot Line. |
