Built at the confluence of the Kupa and Sava rivers on the site of the ancient Roman city of Siscia, Sisak is one of Croatia's most historically significant cities — the site of the landmark Battle of Sisak in 1593, which halted the Ottoman advance into Central Europe. Its triangular Renaissance fortress, the remains of Roman Siscia beneath the modern city, and a vibrant old town make Sisak an underrated destination for history enthusiasts in continental Croatia.
Built at the confluence of the Kupa and Sava rivers on the site of the ancient Roman city of Siscia, Sisak is one of Croatia's most historically significant cities — the site of the landmark Battle of Sisak in 1593, which halted the Ottoman advance into Central Europe. Its triangular Renaissance fortress, the remains of Roman Siscia beneath the modern city, and a vibrant old town make Sisak an underrated destination for history enthusiasts in continental Croatia. Sisak is located in Central Croatia, Croatia at coordinates 45.4891, 16.3747. Type: City. Best months to visit: plan ahead for peak season July–August when accommodation books up fast. Find real-time weather forecasts, crowd level predictions, and visitor tips for Sisak on this page.