1194 – King Richard I of England gives Portsmouth its first Royal Charter.
1230 – William de Braose is hanged by Prince Llywelyn the Great.
1335 – Otto the Merry, Duke of Austria, becomes Duke of Carinthia.
1536 – Anne Boleyn, Queen of England, is arrested and imprisoned on charges of adultery, incest, treason and witchcraft.
1559 – John Knox returns from exile to Scotland to become the leader of the nascent Scottish Reformation.
1568 – Mary, Queen of Scots, escapes from Loch Leven Castle.
1611 – The King James Bible is published for the first time in London, England, by printer Robert Barker.
1670 – King Charles II of England grants a permanent charter to the Hudson's Bay Company to open up the fur trade in North America.
1672 – John Maitland becomes Duke of Lauderdale and Earl of March.
1808 – Outbreak of the Peninsular War: The people of Madrid rise up in rebellion against French occupation. Francisco de Goya later memorializes this event in his painting The Second of May 1808.
1812 – The Siege of Cuautla during the Mexican War of Independence ends with both sides claiming victory after Mexican rebels under José María Morelos y Pavón abandon the city after 72 days under siege by royalist Spanish troops under Félix María Calleja.
1816 – Marriage of Léopold of Saxe-Coburg and Princess Charlotte of Wales.
1829 – After anchoring nearby, Captain Charles Fremantle of HMS Challenger, declares the Swan River Colony in Australia.
1863 – American Civil War: Stonewall Jackson is wounded by friendly fire while returning to camp after reconnoitering during the Battle of Chancellorsville. He succumbs to pneumonia eight days later.
1866 – Peruvian defenders fight off the Spanish fleet at the Battle of Callao.
1876 – The April Uprising breaks out in Bulgaria.
1879 – The Spanish Socialist Workers' Party is founded in Casa Labra Pub (city of Madrid) by the historical Spanish workers' leader Pablo Iglesias.
1885 – Good Housekeeping magazine goes on sale for the first time.
1885 – Cree and Assiniboine warriors win the Battle of Cut Knife, their largest victory over Canadian forces during the North-West Rebellion.
1885 – The Congo Free State is established by King Léopold II of Belgium.
1889 – Menelik II, Emperor of Ethiopia, signs the Treaty of Wuchale, giving Italy control over Eritrea.
1906 – Closing ceremony of the Intercalated Games in Athens, Greece.
1918 – General Motors acquires the Chevrolet Motor Company of Delaware.
1920 – The first game of the Negro National League baseball is played in Indianapolis.
1932 – Comedian Jack Benny's radio show airs for the first time.
1933 – Gleichschaltung: Adolf Hitler bans trade unions.
1941 – Following the coup d'état against Iraq Crown Prince 'Abd al-Ilah earlier that year, the United Kingdom launches the Anglo-Iraqi War to restore him to power.
1945 – World War II: Fall of Berlin: The Soviet Union announces the capture of Berlin and Soviet soldiers hoist their red flag over the Reichstag building.
1945 – World War II: Italian Campaign: General Heinrich von Vietinghoff signs the official instrument of surrender of all Wehrmacht forces in Italy.
1945 – World War II: The US 82nd Airborne Division liberates Wöbbelin concentration camp finding 1000 dead prisoners, most of whom starved to death.
1946 – The "Battle of Alcatraz" takes place; two guards and three inmates are killed.
1952 – The world's first ever jet airliner, the De Havilland Comet 1 makes its maiden flight, from London to Johannesburg.
1955 – Tennessee Williams wins the Pulitzer Prize for Drama for Cat on a Hot Tin Roof.
1963 – Berthold Seliger launches a rocket with three stages and a maximum flight altitude of more than 100 kilometres near Cuxhaven. It is the only sounding rocket developed in Germany.
1964 – Vietnam War: An explosion sinks the USS Card while it is docked at Saigon. Viet Cong forces are suspected of placing a bomb on the ship. She is raised and returned to service less than seven months later.
1964 – First ascent of Shishapangma the fourteenth highest mountain in the world and the lowest of the Eight-thousanders.
1969 – The British ocean liner Queen Elizabeth 2 departs on her maiden voyage to New York City.
1972 – In the early morning hours a fire breaks out at the Sunshine Mine located between Kellogg and Wallace, ID, killing 91 workers.
1980 – Referendum on system of government held in Nepal.
1982 – Falklands War: The British nuclear submarine HMS Conqueror sinks the Argentine cruiser ARA General Belgrano.
1986 – Chernobyl disaster: The City of Chernobyl is evacuated six days after the disaster
1989 – Hungary begins dismantling its border fence with Austria, which allows a number of East Germans to defect.
1994 – A bus crashes in Gdańsk, Poland killing 32 people.
1995 – During the Croatian War of Independence, the Army of the Republic of Serb Krajina fires cluster bombs at Zagreb, killing seven and wounding over 175 civilians.
1998 – The European Central Bank is founded in Brussels in order to define and execute the European Union's monetary policy.
1999 – Panamanian election, 1999: Mireya Moscoso becomes the first woman to be elected President of Panama.
2000 – President Bill Clinton announces that accurate GPS access would no longer be restricted to the United States military.
2004 – The Yelwa massacre concludes. It began on 4 February 2004 when armed Muslims killed 78 Christians at Yelwa. In response, about 630 Muslims were killed by Christians on May 2nd.
2008 – Cyclone Nargis makes landfall in Burma killing over 138,000 people and leaving millions of people homeless.
2008 – Chaitén Volcano begins erupting in Chile, forcing the evacuation of more than 4,500 people.
2011 – Osama bin Laden, the suspected mastermind behind the September 11 attacks and the FBI's most wanted man is killed by the United States special forces in Abbottabad, Pakistan.
2011 – An E. coli outbreak strikes Europe, mostly in Germany, leaving more than 30 people dead and many others sick from the bacteria outbreak.
2011 – The 41st Canadian federal election is held, in which the governing Conservative Party, led by incumbent Prime Minister Stephen Harper, increases their number of seats from a minority to a majority.
2012 – A pastel version of The Scream, by Norwegian painter Edvard Munch, sells for $120 million in a New York City auction, setting a new world record for a work of art at auction.
2014 – Odessa Clashes occur between supporters of a united Ukraine and supporters of Federalization; 48 casualties result.
2014 – Two mudslides in Badakhshan, Afghanistan, leave up to 2,500 people missing.