The Duchy of Carniola was an imperial estate of the Holy Roman Empire, established under Habsburg rule on the territory of the former East Frankish March of Carniola in 1364. A hereditary land of the Habsburg monarchy, it became a constituent land of the Austrian Empire in 1804 and part of the Kingdom of Illyria until 1849. A separate crown land from 1849, it was incorporated into the Cisleithanian territories of Austria-Hungary from 1867 until the state's dissolution in 1918. Its capital was Laibach, today Ljubljana.
- Country
- Holy Roman Empire, Austrian Empire, Austria–Hungary
- Inception
- 1364
