Frederick William III of Prussia
A cautious Prussian king whose reign was defined by catastrophic military defeat, painful reform, and a surprising turn toward religious union.
1770–1840 (age 70)·King of Prussia from 1797 to 1840·Birthday: August 3
Biography
Frederick William III inherited a kingdom on the brink. The cautious, morally rigid monarch watched as Napoleon's armies shattered Prussia's proud military at Jena in 1806, leading to a humiliating occupation. This disaster became the catalyst. With the help of reformers like Stein and Hardenberg, he reluctantly presided over the emancipation of serfs and modernization of the state, though he often dragged his feet, fearful of revolutionary ideas. His personal life was marked by a deep, two-part marriage—first to the beloved Queen Louise, whose death devastated him, and later to a morganatic union. His most lasting, and unintended, legacy may be the 1817 merger of Lutheran and Reformed churches into the Prussian Union, a bureaucratic act that reshaped German Protestantism.
#1 When Frederick Was Born
The biggest hits of 1770
Frederick's Life & Times
The world at every milestone
1770Born
1775Started school
1783Became a teenager
1786Could drive
1788Could vote
1791Turned 21
1800Turned 30
1810Turned 40
1820Turned 50
1830Turned 60
1840Turned 70
Key Achievements
- Presided over the Prussian reforms following defeat by Napoleon, including the Edict of Emancipation in 1807.
- Led Prussia into the final coalition that defeated Napoleon at the Battle of Leipzig in 1813.
- Established the Prussian Union of Churches in 1817, uniting major Protestant denominations.
- Ruled Prussia for over four decades during a period of profound transformation from 1797 to 1840.
Did You Know?
He was a talented amateur cellist and enjoyed playing in chamber ensembles.
His second wife, Auguste von Harrach, was not of royal birth and was given the title Princess of Liegnitz.
He famously declared, 'We must do from above what the French have done from below,' regarding reforms.
The neoclassical Berlin Cathedral was built during his reign as a church for the new Union.
“We must do from above what the French have done from below.”
