The Prussian House of Lords (German: Preußisches Herrenhaus) in Berlin was the upper house of the Landtag of Prussia (German: Preußischer Landtag), the parliament of Prussia from 1850 to 1918. Together with the lower house, the House of Representatives (Abgeordnetenhaus), it formed the Prussian bicameral legislature. The building is now used as the seat of the German Bundesrat.
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