Husayn ibn Ali, grandson of Prophet Muhammad and son of Ali ibn Abi Talib. April 26 – A general amnesty signed by Napoleon allows all but about 1,000 of the most notorious émigrés of the French Revolution to return to France as part of a conciliatory gesture to make peace with the various factions of the Ancien Régime that ultimately consolidates his own rule. May 19 – Napoleon establishes the French Legion of Honour (Légion d'honneur). May 20 – By the Law of 20 May 1802, Napoleon reinstates slavery in the French colonies, revoking its abolition in the French Revolution. May – Madame Marie Tussaud first exhibits her wax sculptures in London, having been commissioned, during the Reign of Terror in France, to make death masks of the victims. June – The first account of Thomas Wedgwood's experiments in photography is published by Humphry Davy in the Journal of the Royal Institution in London. Since a fixative for the image has not yet been developed, the early photographs quickly fade. June 1 The United States Patent and Trademark Office is established within the Department of State. At Huế, shortly before his conquest of Tonkin, Nguyen Anh is crowned as the Emperor Gia Long, the first ruler of the Nguyễn dynasty in Vietnam. June 2 – Indigenous Australian Pemulwuy, a leader of the resistance to European settlement of Australia, is shot dead by Henry Hacking. June 8 – Haitian revolutionary Toussaint Louverture is seized by French troops and imprisoned at the Fort de Joux. July–September July 5 – Parliamentary elections begin in the United Kingdom, with voting continuing until August 28; the Tories, led by Henry Addington, win control of the House of Commons. July 19 – Éleuthère Irénée du Pont founds E. I. du Pont de Nemours and Company, the modern DuPont chemical company, as a gunpowder manufactory near Wilmington, Delaware. July 22 – Gia Long captures Hanoi, completing his unification of Vietnam. July 31 – William Wordsworth, leaving London for Dover and Calais with his sister Dorothy, witnesses the early morning scene which he captures in his sonnet "Composed upon Westminster Bridge". August 2 – In a plebiscite, Napoleon Bonaparte is confirmed as the First Consul of France. September 11 – The Italian region of Piedmont becomes a part of the French First Republic. October–December October 2 – War ends between Sweden and Tripoli. The United States also negotiates