January 27 is the twenty-seventh day of the year in the Gregorian calendar. 338 days (339 in leap years) remain in the year after this day.
447 - An earthquake destroys much of the walls of Constantinople.
661 - Ali's death ends the Rashid Caliphate.
1785 - The University of Georgia is founded, the first state university in the United States.
1822 - At the Assembly of Epidaurus, Greek insurgents declare Greek independence, recognized by Turkey in 1829.
1825 - US Congress approves the creation of Indian Territory (in present-day Oklahoma), paving the way for the resettlement of Native Americans in the eastern United States through the Path of Tears.
1865 - Spain recognizes Peru's independence.
1919 - 13 unarmed German citizens were killed and 60 wounded in Maribor in an event known as the Maribor Bloody Week.
1924 - The government of the Kingdom of Serbs, Croats and Slovenes signs a pact of friendship and cooperation with Italy in Rome and an agreement handing over Rijeka to Italy.
1926 - English inventor John Logie Byrd demonstrates television for the first time in London.
1942 - The Igman March of the First Proletarian Brigade is carried out during the Second Enemy Offensive.
1943 - The United States Air Force launches its first attack on Germany in World War II, bombing Wilhelmshaven all day.
1945 - Auschwitz liberates Soviet troops.
1964 - France establishes diplomatic relations with the People's Republic of China.
1967 - Three American astronauts (Gas Grissom, Edward White and Roger Chafi) die in a capsule on a lunar flight at Cape Canaveral base in the capsule of the Apollo 1 spacecraft in which a fire broke out.
1967 - Representatives of 60 countries sign an agreement banning the use of weapons of mass destruction in space.
1973 - A peace treaty is signed in Paris, ending the Vietnam War and ending US military engagement. The chief negotiators, US Secretary of State Henry Kissinger and North Vietnamese Minister Le Duc To, won the Nobel Peace Prize the same year.
1980 - With the help of Canadian government officials, six US diplomats who have escaped imprisonment in the Iranian hostage crisis have fled to Zurich.
1981 - At least 500 people die on the Indonesian ferry "Tampomas II", which sank in Java after a fire