The Dacian Fortresses of the Orăștie Mountains constitute a system of six ancient military strongholds built to defend the Dacian kingdom against Roman expansion in southeastern Europe. Constructed between the 1st century BC and 1st century AD, these fortresses—including Sarmizegetusa Regia, Costești-Cetățuie, Costești-Blidaru, Piatra Roșie, Bănița, and Căpâlna—were abandoned following ...