- September 29, 0235 St Pontianus ends his reign as Catholic Pope
- September 29, 0440 Leo I becomes pope.
- September 29, 0480 “BC – Battle of Salamis: The Greek fleet under Themistokles, defeats the Persian fleet under Xerxes I.”
- September 29, 0522 “BC – Darius I of Persia kills the Magian usurper Gaumta, securing his hold as king of the Persian Empire.”
- September 29, 0855 Benedict III becomes pope.
- September 29, 0855 Benedict III begins his reign as Catholic Pope
- September 29, 1349 People of Krems Austria accuse Jews of poisoning the wells
- September 29, 1364 “Battle of Auray, English forces defeat French at Brittany”
- September 29, 1567 “At a dinner, the Duke of Alba arrests the Count of Egmont and the Count of Horne for treason.”
- September 29, 1567 The second War of Religion in France breaks out.
- September 29, 1650 “Henry Robinson opens his Office of Addresses and Encounters – the first historically documented dating service – in Threadneedle Street, London.”
- September 29, 1785 Chaidic sect is excommunicated in Cracow Poland
- September 29, 1789 First congress adjourns
- September 29, 1789 The first U.S. Congress adjourns.
- September 29, 1789 The U.S. War Department first establishes a regular army with a strength of several hundred men.
- September 29, 1793 Tennis is first mentioned in an English sporting magazine
- September 29, 1829 London’s Metropolitan Police Force goes on duty
- September 29, 1829 Scotland Yard formed in London
- September 29, 1829 “The Metropolitan Police of London, also known as the Met, is founded.”
- September 29, 1848 Battle of Pkozd: Hungarian forces defeat Croats at Pkozd; the first battle of the War of Independence.
- September 29, 1853 “Emigrant ship “”Annie Jane”” sinks off Scotland, drowning 348″
- September 29, 1859 Great auroral display in US
- September 29, 1863 “The opera “”Pescatori di Perle””, more properly known as “”Les Pêcheurs de Perles””, is produced (Paris)”
- September 29, 1902 Impresario David Belasco opened his first Broadway theater
- September 29, 1907 The cornerstone is laid at Washington National Cathedral in the U.S. capital.
- September 29, 1915 A hurricane claims 275 in the Mississippi Delta
- September 29, 1918 Allied forces scored a decisive breakthrough of the Hindenburg Line
- September 29, 1918 “Australians storm the Hindenburg Line, France”
- September 29, 1918 “Capt. John McGregor (2nd Cdn. Mounted Rifles) wins the Victoria Cross at Cambrai, France”
- September 29, 1918 “Captain GH Wilkins, official AIF photographer, rallies United States troops at the battle of the Hindenburg Line, while taking photographs For this action he is awarded a bar to his Military Cross, becoming the only Australian official photographer to be decorated for bravery in the field”
- September 29, 1918 The Hindenburg Line is broken by Allied forces during World War I. Bulgaria signed an armistice.
- September 29, 1923 Steinhart Aquarium in Golden Gate Park opens to public
- September 29, 1924 Plutarco Elas Calles is proclaimed President of Mexico.
- September 29, 1927 Tornado strikes St Louis Missouri
- September 29, 1930 Boquer¢n battle ends Paraguay border dispute
- September 29, 1930 “The final section of the 3’6″” gauge railway on Prince Edward Island is converted to standard gauge. The conversion work on the island had started in 1919.”
- September 29, 1936 Radio used for first time for a presidential campaign
- September 29, 1938 “Britain, France, Germany and Italy sign the Munich Agreement, allowing Germany to occupy the Sudetenland region of Czechoslovakia.”
- September 29, 1938 “Munich Conference, Chamberlain of Britain and Daladier of France agree to German annexation of part of Czechoslovakia.”
- September 29, 1939 World War II: capitulation of Poland to Germany.