Principality of Hungary

State · 900–999 CE · at its largest around 922 CE

The Hungarian grand principality founded after the conquest of the Carpathian Basin under Árpád. Stephen I was crowned its first king in 1000.

On its lands while it lasted

Great Moravia (c. 833–907 CE): First major Slavic state in Central Europe, centred on the Morava river, which flourished until Magyar invasions in the early 10th century.
Székesfehérvár (c. 900 CE): Capital of Principality of Hungary (900–999), Kingdom of Hungary (1000–1543).
Esztergom (c. 900 CE): Capital of Principality of Hungary (900–999), Kingdom of Hungary (1001–1256).
Bratislava (907 CE): Capital of Kingdom of Hungary (1526–1546).
Nin (c. 926 CE): Capital of Kingdom of Croatia (926–1098).
Biograd na Moru (c. 926 CE): Capital of Kingdom of Croatia (926–1098).
Stephen I of Hungary (c. 975 CE – 1038 CE): First king of Hungary, crowned in 1000 or 1001, who converted his people to Christianity; venerated as Saint Stephen.