Imperial Circle
The Austrian Circle () was an Imperial Circle of the Holy Roman Empire. It was one of the four Imperial Circles created by decree after the 1512 Diet at Cologne, twelve years after the original six Circles were established in the course of the Imperial Reform. It roughly corresponds to present-day Austria (except for Salzburg and Burgenland), Slovenia, and the Trentino-Alto Adige/Südtirol and Venezia Giulia regions of Northern Italy, but also comprised the Further Austrian territories in the former Swabian stem duchy.