Castell de Montjuïc is a baroque fortress in Girona's northern heights, built between 1653 and 1675 under King Felipe IV to defend the city's approaches. The squared fortress features four corner bastions connected by thick defensive walls, sitting at 219 meters elevation overlooking the surrounding plains. Heavily damaged during the Peninsular War sieges and dynamited by French forces during their 1814 retreat, the castle now stands as a declared cultural asset of national interest, representing a key period in Girona's military architecture and territorial defense strategies.