Czech Monarchs
The modern Czech state has never been a monarchy. For all intents and purposes however, it is an indirect successor to the Kingdom of Bohemia and associated titles.
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Greater Moravia
Mojmir I built Moravia by uniting Slavic tribes in the 9th century, especially the principalities of Moravia and Nitra. Moravia was a duchy vassalized to Louis II (a.k.a. Louis the German), king of East Francia.
His nephew and successor Rastislav further consolidated power and repelled East Francia from the realm.
Duchy of Bohemia
In the 890s, Bohemia seceded from Moravia to become a duchy vassal of Arnulf, king of East Francia.
Kingdom of Bohemia
Duchy of Upper and Lower Silesia
Margraviate of Moravia