Gina tsakanin 1763 da 1792, da Graça sansanin soja, kusa da garin Fotigal na elvas, an gina shi ne don kare iyakokin ƙasar daga barazanar mamayewa na har abada daga maƙwabtan Spain masu ƙarfi. Kyakkyawan tsari mai kyan gani wanda yake wakiltar ƙarshen misalin tsarin gine-ginen soja na Renaissance, wanda ya ɗan shuɗe a lokacin da aka gina shi saboda bayyanar weaponsan makamai da na zamani.
Matsakaici da rashin ƙarfi a cikin bayyanar, sansanin soja yana da matakan kariya guda uku, kowannensu ya rabu da tsarin tsattsauran ra'ayi na bango da moats. Bangon waje yana da siffa kamar babban tauraruwa, a cikin salon sauran tsofaffin kagaggun Turawa kamar na Jaca a Spain, Naarden a Holland ko Palmanova a Italiya.
Ba a san ko tsarin Graça ba (sunansa na ainihi shine Fort of Nossa Senhora da Graça) yana amsawa ga bukatun soja ko kuma yana da kyau wani zaɓi na ado. A kowane hali, yana da ban sha'awa ga baƙo. A ciki an kiyaye shi da ƙarancin birni da cikakkun shimfidu waɗanda ke ba da ma'anar alatu.
A tsawon shekaru, an lalata sansanin kuma Ma'aikatar Tsaro ta Fotigal ta yi watsi da ginin. A yau Asusun Gina na Graça ya sami amincewa da Asusun Tarihin Duniya da UNESCO a matsayin rukunin yanar gizo don kariya. Mutanen Espanya matafiya da gaske sauki ziyarci wannan abin mamaki, wanda aka located kawai a kan iyakar, kawai 25 kilomita daga birnin Badajoz.