For much of its history, Šibenik has depended on its fortification system. From the earliest days of its existence, Šibenik was a fortified settlement. As the city expanded and developed throughout history, so did its defense system. From the original castle of St. Michael and the medieval ramparts and towers of the city, the fortress of St. Nicholas in the channel of St. Ante, the Parisotto tower, the Andreis castle and the Vrpolje castle that defended Donje polje to the modern fortresses of St. Ivan and Barone, the Šibenik fortification system has come a long way in development and upgrading. In addition to the defensive function, this thesis deals with the role of the Šibenik fortification system as a motif and inspiration in the poetry and literary works of Šibenik poets and writers: Juraj Šižgorić, Vinko Nikolić, Nikola Tintić and Baltazar Vijolić and Andrija Kačić Miošić, who were not born in Šibenik, wrote about the city of Šibenik, the people of Šibenik and the fortresses and ramparts that defended their freedom and lives. Also, this thesis contains a folk tale by the narrator Josip "Dragan" Morović, from whose narration we learn the folk tale of the Ottoman attacks on Šibenik's Donje polje and the ways of resistance of the local population and the function of the Parisotto tower and Andreis castle in defense and protection. The aim of this research was to investigate and synthesize the development of the Šibenik fortification system and to determine the extent to which it influenced the motives and inspiration of these authors in their poems and literary works.