Wikipedia:Selected anniversaries/September 14

Images
Use only ONE image at a time

Eligible

 * 1723 – António Manoel de Vilhena, Grand Master of the Knights Hospitaller, laid the first stone of Fort Manoel in Malta.
 * 1752 – Under the terms of the Calendar (New Style) Act 1750, the British Empire adopted the Gregorian calendar, skipping 11 days of the month.
 * 1901 – Theodore Roosevelt became President of the United States at age 42, the youngest person ever to do so, eight days after William McKinley was fatally wounded in Buffalo, New York.
 * 1940 – Hungarian forces massacred at least 150 ethnic Romanians in Ip, Transylvania, following rumors that Romanians were responsible for the deaths of two soldiers.
 * 1943 – World War II: Nazi forces began a mass extermination campaign against the civilian residents of around 20 villages on the Greek island of Crete, eventually killing more than 500 men.
 * 1960 – At a conference held in Baghdad, the governments of Iran, Iraq, Kuwait, Saudi Arabia, and Venezuela founded OPEC to help coordinate their petroleum policies and influence global oil prices.
 * 1979 – Afghan president Nur Muhammad Taraki (pictured) was overthrown and later killed on the orders of Hafizullah Amin, who succeeded him.
 * 1992 – The Constitutional Court of Bosnia and Herzegovina declared the breakaway Croatian Republic of Herzeg-Bosnia to be unconstitutional.
 * 2003 – President Kumba Ialá of Guinea-Bissau was deposed in a bloodless military coup.
 * 2007 – Late-2000s financial crisis: The Northern Rock bank received a liquidity support facility from the Bank of England, sparking a bank run—the United Kingdom's first in 150 years.
 * 2015 – Physicists of the LIGO and Virgo projects first observed gravitational waves, the existence of which was predicted by Henri Poincaré in 1905.
 * 2019 – Drone attacks on major processing facilities at Abqaiq and Khurais forced Saudi Arabia to cut more than half of its oil production.
 * Born/died this day: | Constantine V |d|775| Jeremiah Dummer |b|1645|Franz Bopp |b|1791|  John Gould |b|1804|  Ponnambalam Arunachalam |b|1853| Pierre Savorgnan de Brazza |d|1905| Rubby Sherr |b|1913| Paul Poberezny |b|1921| Kate Millett |b|1934| Jacob Gens |d|1943| Eduardo Castro Luque |d|2012| Faith Leech |d|2013