page_title: Jacob Kettler
hierarchical_section_title: Jacob Kettler
caption_attribution_description: English: Jacob Kettler thaler from 1645
context_page_description: Jacob Kettler was a Baltic German Duke of the Duchy of Courland and Semigallia. Under his rule, the duchy reached its peak in wealth and engaged in colonization.
context_section_description: Jacob Kettler (German: Jakob von Kettler) (28 October 1610 – 1 January 1682) was a Baltic German Duke of the Duchy of Courland and Semigallia (1642–1682). Under his rule, the duchy reached its peak in wealth and engaged in colonization.
caption: Jacob Kettler's thaler, 1645.
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