Which ancient kingdom had Prague as its capital?

The Kingdom of Bohemia, sometimes in English literature referred to as the Czech Kingdom was a medieval and early modern monarchy in Central Europe, the predecessor of the modern Czech Republic. It was an Imperial State in the Holy Roman Empire, and the Bohemian king was a prince-elector of the empire. The Czech king besides Bohemia ruled also the Lands of the Bohemian Crown, which at various times included Moravia, Silesia and parts of Saxony, Brandenburg and Bavaria.

The kingdom was established by the Přemyslid dynasty in the 12th century from Duchy of Bohemia, later ruled by the House of Luxembourg, the Jagiellonian dynasty, and since 1526 by the House of Habsburg and its successor house Habsburg-Lorraine. Numerous kings of Bohemia were also elected Holy Roman Emperors and the capital Prague was the imperial seat in the late 14th century, and at the end of the 16th and beginning of the 17th centuries.

Prague is the capital and largest city of the Czech Republic. It is the 14th largest city in the European Union. It is also the historical capital of Bohemia. Situated in the north-west of the country on the Vltava river, the city is home to about 1.26 million people, while its larger urban zone is estimated to have a population of nearly 2 million.