Double-Fortress Bastions: Castruccio Castracani’s Medieval Border Engineering in Serravalle Pistoiese Where the Montalbano hills constrict the corridor between the Ombrone valley and the Valdinievole, the fortified settlement of Serravalle Pistoiese occupied one of the most strategically contested border positions in early fourteenth-century Tuscany. Its paired fortress complexes — one at […]