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| 1738 | Birth |  |
| 4th June London Birth of George III, Norfolk House, St James 's Square, London |
| 1760 | Occupation Hampton Court | |
| Hampton Court Monarchs favour other London homes, Hampton Court ceases to be a royal residence |
| 1761 | Marriage | |
| 8th Sep London Marries Charlotte, daughter of Charles Duke of Mecklenburg-Strelitz |
| 1761 | Succession | |
| 22nd Sep London Succeeds as King of Great Britain, Succeeds his grandfather George II |
| 1762 | Birth | |
| London Birth of George IV, eldest son of George III & Queen Charlotte of Mecklenburg-Strelitz |
| 1762 | Purchase Buckingham Palace | |
| London Purchases what was then Buckingham House for œ21,000 from Sir Charles Sheffield |
| 1763 | Rule of Florida | |
| 10th Feb Florida Under the treaty of Paris Britain gains Florida from Spain |
| 1763 | Rule of Havana | |
| 10th Feb Havan Under the treaty of Paris Britain restores Havana to Spain |
| 1763 | Rule of Louisiana | |
| 10th Feb Louisiana Under the treaty of Paris France gives Spain the Louis iana west of the Mississippi |
| 1763 | Rule of Manila | |
| 10th Feb Manila Under the treaty of Paris Britain restores Manila to Spain |
| 1763 | Rule of Minorca | |
| 10th Feb Minorca Under the treaty of Paris Spain returns Minorca to Britain |
| 1763 | Treaty of Paris | |
| 10th Feb Paris Britain gains Florida from Spain |
| 10th Feb Paris Britain restores Havana & Manila to Spain |
| 10th Feb Paris France cedes Canada & most of her Indian possessions to Britain |
| 10th Feb Paris France gives Spain the Louis iana territory west of the Mississippi |
| 10th Feb Paris George III dismisses Pitt & the Treaty of Paris is signed by George III & Bute |
| 10th Feb Paris Spain returns Minorca to Britain |
| 10th Feb Paris The treaty of Paris ends hostilities |
| 1765 | Birth | |
| 21st Aug Buckingham Pal Birth of William IV, Buckingham Palace, 3rd son of George III & Charlotte |
| 1768 | RAA | |
| 1st Dec London George III becomes patron of the Royal Academy of Arts |
| 1770 | Private Minister | |
| London Appoints Lord North as his own Minister from a party of "King's friends" |
| 1772 | Reform | |
| London If a monarch wishes to marry age over 25 notice must be given to the Privy Council |
| 1774 | Diplomacy | |
| 31st Mar Boston Closes Boston harbour until the East India Company is reimbursed for lost tea |
| 1774 | Sanctions | |
| 31st Mar Boston Closes Boston harbour until the East India Company is reimbursed for lost tea |
| 1780 | Riots Gordon | |
| London Orders an end to the Gordon Riots |
| 1784 | Hameln Fortress | |
| Hameln Hameln becomes known as the "Gibraltar of the north" |
| Hameln The fortress is completed, ordered by George III during the 7 Years War |
| 1784 | Rule of New Brunswick | |
| 18th June New Brunswick Creates new Brunswick to allow for influx of loyalist British supporters from the USA |
| 1785 | Diplomacy | |
| 1st June London Receives John Adams The first American ambassador to Britain |
| 1787 | Plot | |
| 2nd Aug London A failed attempt by Margaret Nicholson to assassinate the King at St James Palace |
| 1794 | Rule of Corsica | |
| Corsica The Corsican Nationalist Assembly proclaims the British King sovereign |
| 1798 | Plot | |
| 15th May London A failed assassination attempt takes place during a review in Hyde Park |
| 15th May London A shot is fired at George III in a Drury Lane theater |
| 1800 | Plot | |
| 15th May London James Hadfield fires shots at George III at the Theatre Royal in Drury Lane |
| 1807 | Parliament | |
| London Dissolved after Grey proposes a Bill allowing Catholics into the Army & Navy |
| 1809 | Jubilee | |
| London A Jubilee is held to celebrate 50 years rule |
| 1811 | Health | |
| 5th Feb The Regency Act is passed making the Prince of Wales Prince Regent |
| 11th Feb London Parliament can appoint the future George IV as Regent due to the health of George III |
| 1811 | Legislation | |
| 5th Feb The Regency Act is passed making the Prince of Wales Prince Regent |
| 1811 | Reform | |
| 11th Feb London Parliament can appoint the future George IV as Regent due to the health of George III |
| 1820 | Death | |
| 29th Jan London Death of George III, age 81 |
