Poland: Beginnings through the Age of Greatness

Beginnings through the Age of Greatness

The territorial dimensions of Poland have varied considerably during its history. In the 9th and 10th cent., the Polians [dwellers in the field] gained hegemony over the other Slavic groups that occupied what is roughly present-day Poland. Under Duke Mieszko I (reigned 960–92) of the Piast dynasty began (966) the conversion of Poland to Christianity. Gniezno was the first capital of Poland and Poznań the first episcopal see. The Piasts expanded their domains in wars against the German emperors, Hungary, Bohemia, Pomerania, Denmark, and Kiev, and in 1025 Boleslaus I (reigned 992–1025) took the title of king.

At the death (1138) of Boleslaus III the kingdom was broken up; its reunification was begun by Ladislaus I, who was king from 1320 to 1333. During the period of disunity, the Teutonic Knights gained a foothold in the then pagan N Poland. Their power was only broken by their defeat at the hands of Polish-Lithuanian forces at Tannenberg (1410); by the second treaty of Toruń (1466) they became vassals of the Polish kings. The main line of the Piast dynasty ended with the death (1370) of Casimir III, whose enlightened economic, administrative, and social policies included the protection of the Jews. He also completed the reunification of the kingdom. After Casimir, the crown passed to his nephew, Louis I of Hungary (reigned 1370–82) and then to Louis' daughter, Jadwiga (reigned 1384–99).

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