Inner Austria

In the west, the Carinthian lands stretched to the Archbishopric of Salzburg and the Habsburg County of Tyrol, while in the east, the Mur River formed the border with the Kingdom of Hungary.

In 1335 Rudolph's grandson Duke Albert II of Austria also received the Carinthian duchy with the adjacent March of Carniola at the hands of Emperor Louis the Bavarian as Imperial fiefs.

In 1457 the Leopoldian line again could assume the rule over the Austrian archduchy, when Ernest's son Duke Frederick V of Inner Austria succeeded his Albertine cousin Ladislaus the Posthumous who had died without issue.

Under the Inner Austrian line founded by his younger son Archduke Charles II, the lands became a centre of the Counter-Reformation, carried out by the Jesuits with great determination.

The Further Austrian/Tyrolean line of Ferdinand's younger brother Archduke Leopold V survived until the death of his son Sigismund Francis in 1665, whereafter all territories ultimately returned to common control with the other Austrian Habsburg lands.

Late 18th century map of the Habsburg Inner Austrian province:
Duchy of Styria
Duchy of Carinthia
Duchy of Carniola with the Lordship of Duino and the March of Istria
Princely County of Gorizia and Gradisca
Imperial City of Trieste
Austria proper (below and above the Enns river), Inner Austria, and Upper Austria (Tyrol and Vorarlberg)
Graz Castle, courtyard
Duchies of Styria, Carinthia, Carniola etc., 1657 map by Joan Blaeu