The citadel (Macel - Mecaluna) was built on the coast, so that its southern walls are in the sea. In 1702, Petar Anđelo Manjo connected the upper part of the Lower Town with a strong wall to the Citadel and thus surrounded the entire city with thick walls, as evidenced by an inscription placed near the Capuchin monastery (today's St. Leopold).The citadel with the Forte Mare fortress gained its main defensive character as a fortress by the sea and is a tower with walls built during the time of various invaders. It is in its foundations that the beginnings of Herceg Novi should be sought. It also includes a stone bridge over today's promenade. With the existing project, this fortress could be restored to its original condition, especially before the fragments of the demolished walls were preserved around its foundations. The citadel was destroyed during the last earthquake, in 1979, which was fatal for it, and sent it into the sea.Today, in memory of this fortress, there are only photographs.