Wikipedia:Selected anniversaries/December 15
This is a list of selected December 15 anniversaries that appear in the "On this day" section of the Main Page. To suggest a new item, in most cases, you can be bold and edit this page. Please read the selected anniversaries guidelines before making your edit. However, if your addition might be controversial or on a day that is or will soon be on the Main Page, please post your suggestion on the talk page instead.
Please note that the events listed on the Main Page are chosen based more on relative article quality and to maintain a mix of topics, not based solely on how important or significant their subjects are. Only four to five events are posted at a time and thus not everything that is "most important and significant" can be listed. In addition, an event is generally not posted this year if it is also the subject of the scheduled featured article or picture of the day.
To report an error when this appears on the Main Page, see Main Page errors. Please remember that this list defers to the supporting articles, so it is best to achieve consensus and make any necessary changes there first.
- 1256 – The Hashshashin stronghold at Alamut (pictured) in present-day Iran was captured and destroyed by Hulagu Khan and the Mongols.
- 1467 – Troops under Stephen III of Moldavia defeated the forces of Matthias Corvinus of Hungary in present-day Baia, Romania.
- 1791 – The first ten amendments to the United States Constitution, collectively known as the Bill of Rights, were ratified.
- 1906 – The Great Northern, Piccadilly and Brompton Railway, a 14.17-kilometre (8.80 mi) long deep-level underground tube railway connecting Hammersmith and Finsbury Park in London, opened.
- 1973 – The American Psychiatric Association removed homosexuality from its official list of mental disorders, the DSM-II.
- 1995 – The European Court of Justice handed down the Bosman ruling, allowing footballers in the European Union to freely transfer from one UEFA Federation to another at the end of their contracts.