February 20 » The Postal Service Act, establishing the United States Post Office Department, is signed by United States President George Washington.
March 16 » King Gustav III of Sweden is shot; he dies on March 29.
March 29 » King Gustav III of Sweden dies after being shot in the back at a midnight masquerade ball at Stockholm's Royal Opera 13 days earlier. He is succeeded by Gustav IV Adolf.
April 21 » Tiradentes, a revolutionary leading a movement for Brazil's independence, is hanged, drawn and quartered.
April 25 » Highwayman Nicolas J. Pelletier becomes the first person executed by guillotine.
October 13 » In Washington, D.C., the cornerstone of the United States Executive Mansion (known as the White House since 1818) is laid.
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