Berthold IV of Zähringen

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History and politics

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What Wikipedia says

Berthold IV, Duke of Zähringen (c. 1125 – 8 December 1186) was a Duke of Zähringen and Rector of Burgundy. He was the son of Conrad I, Duke of Zähringen and Clementia of Luxembourg-Namur. He founded numerous cities, including Fribourg.

Excerpt from the Wikipedia article “Berthold IV of Zähringen”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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