Karl August Fürst von Hardenberg was a Prussian statesman and Chief Minister of Prussia. While during his late career he acquiesced to reactionary policies, earlier in his career he implemented a variety of Liberal reforms. To him and Baron vom Stein, Prussia was indebted for improvements in its army system, the abolition of serfdom and feudal burdens, the throwing open of the civil service to all classes, and the complete reform of the educational system.

The Prussian Reform Movement was a series of constitutional, administrative, social, and economic reforms early in 19th-century Prussia. They are sometimes known as the Stein–Hardenberg Reforms, for Karl Freiherr vom Stein and Karl August von Hardenberg, their main initiators. German historians, such as Heinrich von Treitschke, saw the reforms as the first steps towards the unification of Germany and the foundation of the German Empire before the First World War.