9th Century
| Year | Date | Event |
|---|---|---|
| 811 | The southern boundary of the archdiocese of Salzburg is moved south to the Drava river at the expense of the Patriarchate of Aquileia. | |
| 840 | The Balaton Principality emerges in Pannonia. | |
| 843 | Karantania passes into the hands of Louis the German (804-876). | |
| 871 | The earliest written record of the ancient Karantanian ritual of installing dukes Conversio Bagoariorum et Carantanorum, where is written: ... illi eum ducem fecerunt... (they were made dukes). | |
| 876 | The principality of Prince Kocelj (Balaton Principality) loses its independence. | |
| 887 | Arnulf of Carinthia (850-899) a grandson of Louis the German assumes his title of King of the East Franks and becomes the first Duke of Carinthia. | |
| 894 | Great Moravia probably loses a part of its territory - present-day Western Hungary- to Arnulf of Carinthia, who failed to conquer Great Moravia in 892, 893, 894/895 and 899. | |
| 895 | Accord between Arnulf of Carinthia and the Bohemian Duke Bořivoj (reigned 870-895), Bohemia is freed from the danger of invasion. | |
| 896 | Finno-Ugric Magyars, led by Árpád, settle in the Pannonian plain. The centre of their settlement becomes the region around the Theiss River (Hungary). | |
| 899 | Arnulf of Carinthia dies. |
Read more about this topic: Timeline Of Slovenian History