Alba Iulia has the largest Vauban-style fortress in southeastern Europe. It was built between 1716 and 1735 on the site where a medieval citadel and a Roman castrum once stood. Designed by the Italian architect Giovanni Morando Visconti and approved by Eugene of Savoy, the fortress has six triumphal gates and seven bastions. At the exact geometrical centre of the star, it has a large quadrilateral square, typical of Vauban-style fortresses.
