Historical biography archive · Updated 2026-11-03

Frederick William III Biography and Timeline

Follow Frederick William III through 20 dated historical records for Germany.

Frederick William III, historical timeline

A chronological timeline drawn from matching World History Database records.

20Distinct records
1 of 1Page
1770–1839Years on this page

1770

Birth of Frederick William III

King · Berlin · House / House of Hohenzollern

Birth of Frederick William III, son of Frederick William II

Role range: 1797-1840

1793

Marriage

King · Berlin · House / House of Hohenzollern

Marries Louisa of Mecklenburg-Strelitz

Role range: 1797-1840

1797

Succession

King · Berlin · House / House of Hohenzollern

Succeeds as King of Prussia

Role range: 1797-1840

1805

Alliance Frederick William III and third coalition

King · Warfare / Napoleonic Wars

Prussia joins the third coalition against France by signing a secret Treaty at Potsdam

Role range: 1800-1815 – 1797-1840

1806

Battle of Auerstadt

King · Auerstadt · Warfare / Napoleonic Wars

Prussia loses 25,000 killed & wounded & 25,000 taken prisoner. Prussia is forced to concede land west of the Elbe

Role range: 1800-1815 – 1797-1840

Battle of Jena

King · Jena · Warfare / Napoleonic Wars

Prussia is defeated at Jena by the French

Role range: 1800-1815 – 1797-1840

Declaration of War

King · Warfare / Napoleonic Wars

Resumption of war against Napoleon

Role range: 1800-1815 – 1797-1840

1807

Peace

King · Tilsit · Warfare / Napoleonic Wars

Frederick William attends the peace discussions between Napoleon & Alexander

Role range: 1800-1815 – 1797-1840

Independence of Danzig

King · Danzig · Warfare / Napoleonic Wars

Under the 2nd Treaty of Tilsit Danzig becomes a free city

Role range: 1800-1815 – 1797-1840

Independence of Germany

King · Danzig · Warfare / Napoleonic Wars

Under the 2nd Treaty of Tilsit Danzig becomes a free city

Role range: 1800-1815 – 1797-1840

Treaty of Tilsit, 2nd

King · Tilsit · Warfare / Napoleonic Wars

Prussia's Army is reduced to 42,000. Prussia loses most of its Polish territory to the grand Duchy of Warsaw. Prussia loses half of its territory west of the River Elbe to France. Danzig becomes a free city

Role range: 1800-1815 – 1797-1840

1811

Siege of Berlin

King · Berlin · Warfare / Napoleonic Wars

Napoleon threatens to invade Berlin if Prussia makes an alliance with Russia

Role range: 1800-1815 – 1797-1840

1812

Alliance Prussia and France

King · Warfare / Napoleonic Wars

Prussia allows for the free passage of French troops against Russia

Role range: 1800-1815 – 1797-1840

1814

Magdeburg Returns To Prussian Control

Magdeburg · Government / Government of Germany

Magdeburg returned to Prussian sovereignty after Napoleon's defeat and the end of French rule in the region.

1815

Congress of Vienna

King · Vienna · Warfare / Napoleonic Wars

Prussia acquires Westphalia & most of Saxony

Role range: 1800-1815 – 1797-1840

1820

Constitution of Germany

King · Berlin · Government / Government of Germany

The Government cannot raise a loan without an elected representative Assembly. Promises to give Prussia a Constitution

Role range: 1797-1840

1826

King Funds Magdeburg Cathedral Restoration

Magdeburg · Government / Government of Germany

Frederick William III of Prussia supported major repairs to Magdeburg Cathedral following the damage and neglect of earlier periods.

1839

Belgian Neutrality

King · Berlin · House / House of Hohenzollern

Prussia joins the international guarantee of Belgium's independence and perpetual neutrality.

Role range: 1797-1840

Luxembourg Settlement

King · Luxembourg · House / House of Hohenzollern

Accepts the partition of Luxembourg incorporated into the final Belgian-Dutch settlement.

Role range: 1797-1840

Treaty of London

King · London · House / House of Hohenzollern

Prussia joins the other Great Powers in guaranteeing the settlement that recognises Belgian independence and permanent neutrality.

Role range: 1797-1840

Records, sources and methodology

These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.