East Franks

State · 850–910 CE · at its largest around 896 CE

East Francia, the eastern kingdom created at Verdun in 843 for Louis the German, which developed into the Kingdom of Germany.

On its lands while it lasted

Trier (16 BCE – 1618 CE): Capital of Electorate of Trier (1333–1618).
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.
Sibenik (860 CE): Capital of Kingdom of Croatia (926–1098).
Brunswick (861 CE): Capital of Duchy of Brunswick (1815–1870).
Mission of Cyril and Methodius (863 CE): Byzantine brothers sent as missionaries to Great Moravia, who created the Glagolitic alphabet and translated the liturgy into Old Church Slavonic.
Hungarian conquest (c. 895 CE): Magyar tribes led by Árpád crossed the Carpathians and settled the Pannonian Basin, laying the foundation of the Hungarian state.
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).
Cluny Abbey (910 CE): Benedictine abbey in Burgundy founded in 910 that led a major movement of monastic reform; its church was long the largest in Christendom.