UNSKI »LIMES«. UTJECAJ RELJEFA NA PROTUOSMANSKO ORGANIZIRANJE OBRANE ZAGREBAČKE ŽUPANIJE (XV. – XVI. ST.)
THE UNA “LIMES”: THE INFLUENCE OF TERRAIN ON THE ANTI-OTTOMAN DEFENSE ORGANIZATION OF ZAGREB COUNTY (15th – 16th CENTURY)

Summary/Abstract: Throughout the high and late Middle Ages and into the early modern period, the Una River played a pivotal role in connecting the eastern Adriatic coast with the Pannonian Plain, linking the medieval Kingdom of Croatia and Dalmatia with Banovina, the Kingdom of Slavonia, and the Kingdom of Hungary. This key route traversed several Croatian and Slavonian counties, the largest of which was Zagreb County, encompassing extensive portions of the central and lower Una region from Bihać to Dubica. Initially, in the high Middle Ages, this region was defended by only a few fortified towns (castrum) situated on the slopes of the Petrova and Zrinska mountains or along the banks of the Una River. This situation remained largely unchanged until the end of the 15th century and the first half of the 16th century, when the Ottoman threat prompted the construction of numerous Renaissance castles. In line with Renaissance defensive architecture, older fortified towns (castrum) were simultaneously reinforced, while former unfortified settlements were encircled by systems of walls and defensive ditches. By the mid-16th century, these old and new fortifications were interconnected into a defense network of structures and complexes adapted to the terrain configuration, forming the Una “Limes” – a precursor to the Croatian Military Frontier or Military Border. In the 16th century, the Una “Limes” of Zagreb County played a significant role in defending the Triune Kingdom of Croatia, Dalmatia, and Slavonia, as well as neighboring Habsburg lands of Carniola and Styria. Construction began during the reign of Matthias Corvinus, who in 1471 granted Slavonian nobility the right to build fortresses on their estates, and was completed during the early Habsburg rule, as fortifications along the Una and its immediate hinterland, positioned along the Ottoman front line, were systematically joined into a chain of border fortifications stretching from the Drava River to the Adriatic Sea under unified military command. By 1553, most anti-Ottoman fortresses in Zagreb County were integrated into the Croatian Military Frontier (Krabatische Graenitz in German). Although the Ottomans breached the Una defense line in the final quarter of the 16th century, its persistent decades-long defense allowed for the establishment of a new anti-Ottoman line further behind it, on the western slopes of the Petrova and Zrinska mountains and along the banks of the Kupa River, halting the Ottoman expansion to the West permanently in the 1590s.

• Details
• Contents