1787 – Pennsylvania becomes the second state to ratify the United States Constitution, five days after Delaware became the first.
1862 – USS Cairo sinks on the Yazoo River, becoming the first armored ship to be sunk by a controlled mine.
1901 – Guglielmo Marconi receives the first transatlantic radio signal (the letter “S” [***] in Morse Code), at Signal Hill in St John’s, Newfoundland.
1915 – President of the Republic of China, Yuan Shikai, announces his intention to reinstate the monarchy and proclaim himself Emperor of China.
1925 – The Majlis of Iran votes to crown Reza Khan as the new Shah of Iran, starting the Pahlavi dynasty.
1935 – Lebensborn Project, a Nazi reproduction program, is founded by Heinrich Himmler.
Mayor Ed Koch of New York, Congresswoman Bella Abzug, and President Jimmy Carter
2015 – Paris Agreement relating to United Nations Framework Convention on Climate Change is adopted.
1924 – Ed Koch, American lawyer, judge, and politician, 105th Mayor of New York City (d. 2013)
1858 – Jacques Viger, Canadian archaeologist and politician, 1st Mayor of Montreal (b. 1787)