Set atop the rise in the middle of Pula, Kastel is a Venetian fortress from the 1600s.
You’ll notice that the powerful-looking walls are in a star configuration, which was a state-of-the-art design to repel artillery after the arrival of gunpowder.
Kastel was created to be the Venetians’ main stronghold, defending Pula’s harbour as well as the entire upper Adriatic.