Cittadella of Alessandria - Credit: Wikimedia Commons
The Cittadella of Alessandria () is a star fort and citadel in the city of Alessandria, Italy. It was built in the 18th century by the Kingdom of Sardinia, and today it is one of the best preserved fortifications of that era. It is one of the few fortifications in Europe still in their original environment, since there are no buildings blocking the views of the ramparts, or a road that surrounds the ditches. Read more on Wikipedia
Source: en.wikipedia.org