May 11 (May 11) is the 131st day of the year in the Gregorian calendar (132nd in leap years). There are 234 days remaining until the end of the year.
330 - Roman Emperor Constantine I the Great inaugurates New Rome on the site of a former Byzantine Greek colony.
1310 - 45 Knights Templar are burned at the stake on charges of being heretics.
1745 - French troops defeat the British at the Battle of Fontenoy and take over the Netherlands from Austria.
1824 - British Burgundians take over Rangoon in Burma.
1858 - Minnesota is admitted to the Union as the 32nd state of the United States.
1867 - The Treaty of London guarantees the independence and neutrality of the Duchy of Luxembourg.
1916 - Einstein's General Theory of Relativity is introduced.
1931 - The collapse of Austria's largest bank, Credit-Anstalt, marks the beginning of the financial collapse of Central Europe.
1949 - Siam changes its name to Thailand.
1949 - Israel is admitted to the United Nations.
1950 - West German Chancellor Konrad Adenauer becomes president of the United Christian Democratic Union.
1960 - Israeli secret service Mossad captures Adolf Eichmann, who is hiding in Argentina.
1966 - In the Champions Cup final at the Heisel Stadium in Brussels, Real Madrid beat Partizan 2-1, winning their sixth European title.
1968 - In an effort to end student clashes with police, French Prime Minister Georges Pompidou makes concessions to students.
1973 - Diplomatic relations are established between the Federal Republic of Germany and the German Democratic Republic, ending a period of non-recognition of the German Democratic Republic as a sovereign state.
1987 - Indian Prime Minister Rajiv Gandhi puts Punjab under federal control over the Sika uprising.
1992 - Due to the involvement of the Yugoslav army in the conflict in Bosnia, the European Union's foreign ministers decide to withdraw the ambassadors from Belgrade and demand the suspension of Yugoslavia's membership in the OSCE.
1996 - A US DC 9 passenger plane crashes in the Everglades swamp in Florida shortly after taking off from Miami airport. All 110 passengers and crew were killed.
1997 - IBM's "Deep Blue" supercomputer defeats world chess champion, Russian grandmaster Gary Kasparov, in a six-match match.
2000 - India welcomes its billionth resident to the state