Delbrück, Rudolf Von
´dôlf fən), 1817–1903, German statesman. He served (1857–76) under Bismarck as president of the chancellery of the North German Confederation (1866–71) and, after 1871, of the German Empire. A protagonist of free trade and liberal economics, he opposed Bismarck's adoption of a protectionist policy in the 1870s and resigned in 1876.