Throughout the duchy Wallenstein's financier Hans de Witte set up and controlled silver, copper and lead mines, iron forges, armament factories and river Labe transportation system, all geared up to supply warlord's forces.
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Jan Morávek, Zdeněk Wirth: Waldštejnův Jičín (Waldstein's Jičín), Prague, 1946.
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After Wallenstein's death (1634) most of the duchy was given to Count Matthias Gallas and its independent status was annulled.
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