社会主義者鎮圧法
In 1878, he was appointed German Vice-Chancellor under Chancellor Bismarck. Stolberg was instrumental in the development of the Dual Alliance with Austria which was concluded in Autumn 1879. He also supported Bismarck's Anti-Socialist Laws, however, over time had more and more differences with the Chancellor and finally resigned from office in 1881. Stolberg remained an active politician, serving as Prussian treasurer and Minister of the Royal House. In 1890 he was granted the hereditary title of Prince ("Fürst" in German) by Emperor Wilhelm II.