1648 – The second treaty of the Peace of Westphalia, the Treaty of Münster, was signed, ending both the Thirty Years' War and the Dutch Revolt, and officially recognizing the Republic of the Seven United Netherlands and Swiss Confederation as independent states.
1889 – Sir Henry Parkes, Premier of the Colony of New South Wales, gave a speech where he called for the federation of the six Australian colonies.
1931 – The George Washington Bridge (pictured), today the world's busiest motor vehicle bridge, connecting New York City to Fort Lee, New Jersey, was dedicated.
1945 – The UN Charter, the constitution of the United Nations, entered into force after being ratified by the five original permanent members of the Security Council and a majority of the other signatories.
1975 – To protest wage discrepancy and unfair employment practices, 90% of the female population in Iceland went on strike for a day.
