Omis, the town of contrasts, both - natural and historical. It was founded and grown on the steep slopes of Omis Dinara mountain, surrounded by the Cetina River in the north-west, and the sea in the south and south-east. Omis is also known as old pirate town. As excellent seamen, Omis citizens, during 13th - beginning of 15th century, “supervised” navigation on the Adriatic Sea, endangering, generally, Venetian ships and their property in Dalmatia, as well as ships of Naples Kingdom. They were “taking charges” for free navigation. Omis pirates were extremely dangerous, especially under rule of powerful Omis rulers - dukes Kacic. In that time, Omis was known as dangerous nest of the pirates, as they were Saracens on Mediterranean Sea or Tatars on Black Sea