Between the 7th and 11th centuries the state of Carantania united almost all Alpine and Pannonian Slavs. The principality of Carantania is particularly notable for the ancient ritual of installing Carantanian dukes. 

The ritual took place at the Prince's Stone in Zollfeld, in the area of the present-day Austrian province of Carinthia.

The Prince's Stone was a symbol of political power and it can be seen today in Klagenfurt. Even though Carantania existed for only 300 years, it marked the national identity importantly. 

The Prince’s Stone adorns the Slovenian euro coin for 2 cents.