Located in the Danube basin, the ancient Roman province Pannonia Superior, Austria bordered on the Kingdom of Hungary beyond the March and Leitha rivers in the east.
In the south it was confined by the Duchy of Styria, with the border at the historic Semmering Pass, while in the north the Bohemian Forest and the Thaya river marked the border with Bohemia and Moravia.

In the west, the Upper Austrian part bordered on the Bavarian stem duchy.
The adjacent Innviertel region belonged to the Bavarian dukes, until it was occupied by Austrian forces during the War of the Bavarian Succession in 1778 and incorporated into the archducal lands according to the Peace of Teschen.
In the course of the German mediatisation in 1803, the Austrian archdukes also acquired the rule over the Electorate of Salzburg and the Berchtesgaden Provostry.
Located in the Danube basin, the ancient Roman province Pannonia Superior, Austria bordered on the Kingdom of Hungary beyond the March and Leitha rivers in the east. In the south it was confined by the Duchy of Styria, with the border at the historic Semmering Pass, while in the north the Bohemian Forest and the Thaya river marked the border with Bohemia and Moravia.
In the west, the Upper Austrian part bordered on the Bavarian stem duchy. The adjacent Innviertel region belonged to the Bavarian dukes, until it was occupied by Austrian forces during the War of the Bavarian Succession in 1778 and incorporated into the archducal lands according to the Peace of Teschen. In the course of the German mediatisation in 1803, the Austrian archdukes also acquired the rule over the Electorate of Salzburg and the Berchtesgaden Provostry.
Archduchy of Austria