Sisak

Sisak stands where the Kupa joins the Sava, on the site of the Roman city of Siscia. Its riverside fortress was built by the Chapter of Zagreb to defend the Croatian lands against Ottoman attacks. Brick and stone from the ancient city supplied much of the building material, joining the remains of one frontier settlement to the defences of another.

Construction of the fortress began in 1544. Hasan Pasha Predojević, the Ottoman governor of Bosnia, besieged Sisak repeatedly; on 22 June 1593 a relieving Christian army defeated his forces near the fortress, and the pasha was killed. The Ottomans nevertheless captured Sisak later that summer, holding it for about a year. In the eighteenth century the Kupa separated the civilian town on its left bank from a planned military settlement on the right, reflecting the division between civilian Croatia and the Military Frontier.