This is attested to by the underwater wall (Mostina) at the mouth of the River Cetina that is still visible today. Following the traces of the former town walls, we reach the Mirabela fortress (12^th-13^th century) that dominates the historical centre of Omiš. High on the cliffs above the canyon of the River Cetina and the town lies another fortification, the Starigrad-Fortica fortress (14^th-15^th century). Thanks to its position, the Fortica is definitely one of the most picturesque fortresses in the Adriatic Littoral. In memory of the town’s glorious pirate past and resistance to Venetian rule, every year on 18 August there is the Pirate Battle historical spectacle in Omiš harbour