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In page Wenceslaus I, Duke of Bohemia:

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The hymn "Svatý Václave" (Saint Wenceslaus) or "Saint Wenceslas Chorale" is one of the oldest known Czech songs. Traceable to the 12th century AD, it is still among the most popular religious songs in the Bohemian lands. In 1918, at the founding of the modern Czechoslovak state, the song was discussed as a possible choice for the national anthem. During the Nazi occupation, it was often played along with the Czech anthem.[citation needed]