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The Waterloo Chamber, dating from 1830–31, is a large room in Windsor Castle dedicated to the initial military vanquishing of the French Emperor Napoleon Bonaparte by British, Prussian, Russian and Austrian forces under the command of the Duke of Wellington at Waterloo in Belgium.
Designed by the architect Jeffry Wyattville in place of the Queen's Drawing Room, Queen's Ballroom, Queen's Audience Chamber, Queen's Presence Chamber, Queen's Guard Chamber, King's Presence Chamber, King's Audience Room, King's Drawing Chamber and King's Dining Chamber which were all in Hugh May's 17th-century structure, the Waterloo Chamber along with the Grand Reception Room, White Drawing Room, Green Drawing Room, Crimson Drawing Room, State Dining Room and Octagonal Dining Room was formed.
The famed portrait painter Sir Thomas Lawrence was commissioned by King George IV of the United Kingdom to paint all the major figures who came together to defeat the French emperor and today these works still hang assembled there. Lawrence both traveled Europe and at another time kept a studio in London to complete the task which was delayed by the defeated Emperor Napoleon's escape from the island of Elba and subsequent retaking of the French throne. Among the luminaries immortalized in portraiture in the chamber by Lawrence are Tsar Alexander I of Russia, Emperor Francis I of Austria, King Frederick William III of Prussia, Field-Marshal Karl Philip Prince of Schwarzenberg, Archduke Charles of Austria, Napoleon II, Pope Pius VII, Cardinal Consalvi and the aforementioned Duke of Wellington.
Today, each June the garter luncheon, given by Queen Elizabeth II of the United Kingdom for the Knights and Ladies of the Garter is held in the chamber.