soldiers fought without allies against the Turks, the military faction of Uskoks was formed, which later became famous as an elite Croatian militant sect. Ultimately, the defenders were defeated and the fortress was occupied by the Ottomans in 1537. After more than a century under Ottoman rule, in 1669, Klis Fortress was besieged and seized by the Republic of Venice, thus moving the border between Christian and Muslim Europe further east and helping to contribute to the decline of the Ottoman Empire. The Venetians restored and enlarged the fortress, but it was taken by the Austrians after Napoleon extinguished the republic itself in 1797. Today, Klis Fortress contains a museum where visitors to this historic military structure can see an array of arms, armor, and traditional uniforms. Location The fortress is located above a village bearing the same name, from the Adriatic Sea, on a pass that separates the mountains Mosor and Kozjak, at the altitude of , northeast of Split in Croatia. Owing to its strategic position, the fortress is regarded as one of the region's most important fortifications. Perched on an isolated rocky eminence, inaccessible on three sides, the fortress overlooks Split, the ancient Roman settlement of Salona, Solin, Kaštela and Trogir, and most of the central Dalmatian islands. Historically, the fortress has controlled access to and from Bosnia, Dalmatia and inland Croatia. The importance of such a position was felt by every army that invaded, or held possession of this part of Croatia. Klis Fortress was a point against which their attacks were always directed, and it has been remarkable for the many sieges it withstood. It has been of major strategic value in Croatia throughout history. History Ancient stronghold of Illyrians and Romans The ancient Illyrian tribe of Dalmatae, which held a stronghold on this spot, were the first known inhabitants who lived on the site of what is today Klis Fortress. They were defeated several times, and in the year 9 AD, finally annexed by Romans. Today's Klis Fortress was known to the Romans by the name of "Andetrium" or "Anderium", and in later times "Clausura", which is the origin of later "Clissa" and modern "Klis". To the Romans, Klis became famous for its celebrated siege by Augustus, at the time of the Illyrian revolt in Dalmatia. The road that lead from Klis to Salona was called "Via Gabiniana" or "Via Gabinia", which according to