February 27

• February 27, 425
  Byzantine Emperor Theodosius II founds the University of Constantinople
• February 27, 1531
  German evangelical monarchy joins Schmalkaldic League, a defensive alliance of Lutheran princes within the Holy Roman Empire
• February 27, 1670
  Jews are expelled from Vienna by order of Leopold I
• February 27, 1861
  In the Warsaw massacre Russian troops fire on a crowd protesting Russian rule over Poland and kill five marchers
• February 27, 1879
  Constantin Fahlberg discovers saccharin, artificial sweetener
• February 27, 1883
  Oscar Hammerstein I, a businessman and composer in New York City, patents first cigar-rolling machine
• February 27, 1906
  France and Britain agree to joint control of New Hebrides, an island group in the South Pacific
• February 27, 1940
  Martin Kamen and Sam Ruben discover carbon-14, creating the basis for the radiocarbon dating method
• February 27, 1956
  Female suffrage in Egypt
• February 27, 1957
  Chinese Chairman Mao's speech "On the Correct Handling of Contradictions Among People", marking the start of Hundred Flowers Campaign, a campaign encouraging its citizens to openly express their opinions of the communist regime
• February 27, 1972
  US President Richard Nixon and Chinese Premier Zhou Enlai issue Shanghai Communique, pledging that it is in the interest of all nations for the United States and China to work towards the normalization of their relations
• February 27, 1980
  M-19 guerrillas begin the Dominican embassy siege in Colombia, holding 60 people hostage, including 14 ambassadors
• February 27, 2012
  Yemeni President Ali Abdullah Saleh is succeeded by Vice President Abd Rabbuh Mansur Al-Hadi as a result of Yemeni Revolution