Real Cittadella
Messina, Italy · built 1680
The Real Cittadella was a fort in Messina, Sicily, southern Italy. The Cittadella was built between 1680 and 1686 by the Spanish Empire, and it was considered to be one of the most important fortifications in the Mediterranean. Most of the fort was demolished in the 20th century, but some parts can still be seen.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).