What happened on September 15

57 documented historical events happened on September 15, from antiquity to the present day. The best known is this: The Ottoman conquest of Lesbos ended upon the surrender of commander Niccolò Gattilusio; the conquering Mehmed II executed 300 Italian soldiers by chopping them in half, claiming he was fulfilling a promise to "spare their heads". On the same day, in another year: American Revolutionary War: British forces made an unopposed amphibious landing at Kips Bay on Manhattan, the American defenders having fled due to artillery fire. On Almanaccolo every event is listed in chronological order, grouped by century, and links to the Wikipedia article it comes from, so you can always read further or check the source. Alongside the events you find who was born and who died on this date, and which observances are celebrated around the world.

160 people with a Wikipedia article were born on September 15, including Fausto Coppi, Richard Gordon (English author), Bob Anderson (fencer). The list spans every era and every field — art, science, politics, sport, entertainment — ordered by year of birth, from the earliest to the most recent. The six featured people are those most has been written about: the ordering uses the length of their Wikipedia article as an indicator of prominence. For each one you find their occupation, year of birth and a link to the full biography.

110 people with a Wikipedia article died on September 15, including Ludmila of Bohemia, Alan, 1st Earl of Richmond, Dmitry of Tver. The list is in chronological order by year of death and spans all of documented history, from antiquity to the present day. For each person you find their occupation, the year and a link to the Wikipedia biography, where the full story and its sources can be read.

18 observances are celebrated on September 15 around the world: Battle of Britain Day (United Kingdom), Christian feast day: Joseph Abibos, Christian feast day: Alpinus (Albinus) of Lyon, Christian feast day: Aprus (Èvre) of Toul, Christian feast day: Catherine of Genoa, Christian feast day: James Chisholm (Episcopal Church). The list gathers national holidays, international days and religious or civil observances falling on this date in different countries, as recorded on Wikipedia. Some are fixed and recur on the same day every year; others depend on the local calendar. Each links to the article explaining its origin and meaning.