The Late Medieval Zagreb County as the Part of Antemurale Christianitats. The Case Study of Zrin Estate

Although Ottoman raids on parts of Medieval Slavonia, which is now Central Croatia, began in the early 15th century, it wasn't until the fall of the Medieval Kingdom of Bosnia into Ottoman hands in 1463 that the raids intensified and the Ottoman raiders continuously plundered areas of medieval Croatia and Slavonia. It was during the mid-15th century that Croatian lands started to be recognized as Antemurale Christianitatis, meaning they were seen as frontier states of Western Christendom, primarily serving as a defensive barrier against non-Christian peoples in the East. During this time, several important strongholds were established in the late medieval Zagreb County, particularly on the Zrin estate, to defend against the Ottomans. Feudal lords of medieval Croatia and Slavonia began organizing elaborate defensive systems on their estates, consisting of strategically positioned smaller and larger strongholds. The Zrin estate was one such example. This paper focuses on the defensive systems of the Zrin estate during the late 15th and first half of the 16th century. It examines the number, typology, and fortification features of the strongholds on the estate, as well as their strategic positions and defensive capabilities.