Jisho

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公国
Wikipedia definition
1. Duchy of Courland and SemigalliaThe Duchy of Courland and Semigallia (Latin: Ducatus Curlandiæ et Semigalliæ, Polish: Księstwo Kurlandii i Semigalii, German: Herzogtum Kurland und Semgallen, Latvian: Kurzemes un Zemgales hercogiste) is the name of a duchy in the Baltic region that existed from 1562 to 1569 as a vassal state of the Grand Duchy of Lithuania and from 1569 to 1726 the Polish-Lithuanian Commonwealth, incorporated into Polish-Lithuanian Commonwealth by Sejm in 1726, but on March 28, 1795, it was annexed by the Russian Empire in the third Partition of Poland.
Read “Duchy of Courland and Semigallia” on English Wikipedia
Read “クールラント・ゼムガレン公国” on Japanese Wikipedia
Read “Duchy of Courland and Semigallia” on DBpedia

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