Zollfeld

Zollfeld (Slovene: Gosposvetsko polje) is a slightly ascending plain in Carinthia, Austria with interspersed small woods, hills, and swamps.

The oldest archaeological findings at Magdalensberg originate from the time of Hallstatt culture (8th to 6th centuries BCE).

[3] Following the Slavic settlement of the Eastern Alps about 600, the Karnburg (Krnski grad) fortress became the center of the Principality of Carantania, which about 740 was vassalized by Duke Odilo of Bavaria.

With Bavaria, a part of the Carolingian Empire under Charlemagne from 788 onwards, a Kaiserpfalz at Karnburg was erected about 830.

Inside the castle was a meeting place, where the Prince's Stone, the base of an ancient Roman Ionic column, stood and the Dukes of Carantania were installed.