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National Convention is the legislative body of the Fraternity in which undergraduate and alumni delegates, along with National Council, enact legislation and adopt positions on matters of national importance.
Leadership School is an annual national meeting held in approximately mid-August. In non-Convention years, Leadership School includes the Awards Luncheon and Annual Banquet.
In 1973, Triangle returned to a former practice of biennial instead of annual legislative meetings. In the odd-numbered years, Convention and Leadership School are combined in a sequence of alternate sessions.
| December 9-11, 1909 |
Champaign, Illinois |
| February 3-4, 1911 |
West Lafayette, Indiana |
| February 2-3, 1912 |
Columbus, Ohio |
| February 7-8, 1913 |
Champaign, Illinois |
| February 27-28, 1914 |
Madison, Wisconsin |
| February 26-27, 1915 |
West Lafayette, Indiana |
| February 24-26, 1916 |
Columbus, Ohio |
| February 22-24, 1917 |
Champaign, Illinois |
| February 21-23, 1918 |
Madison, Wisconsin |
| March 6-8, 1919 |
West Lafayette, Indiana |
| February 26-28, 1920 |
Columbus, Ohio |
| March 3-5, 1921 |
Champaign, Illinois |
| May 4-6, 1922 |
Madison, Wisconsin |
| May 3-5, 1923 |
West Lafayette, Indiana |
| May 8-l0, 1924 |
Lexington, Kentucky |
| April 30-May 2, 1925 |
Cincinnati, Ohio |
| April 22-24, 1926 |
Chicago, Illinois |
| April 28-30, 1927 |
Chicago, Illinois |
| April 26-28, 1928 |
Chicago, Illinois |
| April 25-27, 1929 |
Chicago, Illinois |
| May 1-3, 1930 |
Chicago, Illinois |
| April 30-May 2, 1931 |
Chicago, Illinois |
| April 28-30, 1932 |
Urbana, Illinois |
| April 27-29, 1933 |
Chicago, Illinois |
| April 26-28, 1934 |
Chicago, Illinois |
| April 25-27, 1935 |
Chicago, Illinois |
| April 23-25, 1936 |
Columbus, Ohio |
| August 30-September 3, 1937 |
Rapid City, South Dakota |
| September 7-10, 1938 |
Chicago, Illinois |
| September 6-9, 1939 |
West Lafayette, Indiana |
| September 4-7, 1940 |
Minneapolis, Minnesota |
| September 3-6, 1941 |
Cincinnati, Ohio |
| October 25-27, 1946 |
Chicago, Illinois |
| September 3-5, 1947 |
Chicago, Illinois |
| September 2-5, 1948 |
Madison, Wisconsin |
| September 1-3, 1949 |
Louisville, Kentucky |
| August 30-September 2, 1950 |
Brainerd, Minnesota |
| September 6-8, 1951 |
Columbus, Ohio |
| September 10-13, 1952 |
Chicago, Illinois |
| August 31-September 4, 1953 |
Sylvan Lake, South Dakota |
| August 31-September 3, 1954 |
St. Louis, Missouri |
| August 30-September 2, 1955 |
University Park, Pennsylvania |
| August 28-31, 1957 |
Urbana, Illinois |
| September 2-5, 1959 |
Ithaca, New York |
| August 30-September 2, 1961 |
Milwaukee, Wisconsin |
| August 26-29, 1963 |
Excelsior Springs, Missouri |
| September 2-5, 1964 |
Champaign, Illinois |
| November 25-28, 1965 |
Cincinnati, Ohio |
| November 24-27, 1966 |
Chicago, Illinois |
| November 24-26, 1967 |
Minneapolis, Minnesota |
| November 29-December 1, 1968 |
Columbus, Ohio |
| August 27-30, 1969 |
Windsor, Ontario, Canada |
| September 2-5, 1970 |
Boulder, Colorado |
| September 2-4, 1971 |
Waukegan, Illinois |
| August 3-5, 1972 |
Waukegan, Illinois |
| August 9-11, 1973 |
Waukegan, Illinois |
| August 2, 1974 |
Columbus, Ohio |
| August 14-16, 1975 |
Rolla, Missouri |
| August 14, 1976 |
Pittsburgh, Pennsylvania |
| August 18-20, 1977 |
West Lafayette, Indiana |
| August 18-19, 1978 |
Lawrence, Kansas |
| August 16-18, 1979 |
Milwaukee, Wisconsin |
| August 15-16, 1980 |
Toledo, Ohio |
| August 13-15, 1981 |
Ann Arbor, Michigan |
| August 13-14, 1982 |
Champaign, Illinois |
| August 11-13, 1983 |
Cincinnati, Ohio |
| August 10-12, 1984 |
Ames, Iowa |
| August 15-17, 1985 |
Columbus, Ohio |
| August 14-16, 1986 |
St. Louis, Missouri |
| August 13-15, 1987 |
Milwaukee, Wisconsin |
| August 21-23, 1988 |
Lincoln, Nebraska |
| August 20-23, 1989 |
Ft. Collins, Colorado |
| August 12-14, 1990 |
Cincinnati, Ohio |
| August 11-14, 1991 |
Washington, D.C. - Convention minutes |
| August 8-11, 1992 |
Rapid City, South Dakota |
| August 14-17, 1993 |
Indianapolis, Indiana - Convention minutes |
| August 6-9, 1994 |
Madison, Wisconsin |
| August 5-8, 1995 |
Kansas City, Missouri |
| August 3-6, 1996 |
West Lafayette, Indiana |
| August 9-12, 1997 |
Minneapolis, Minnesota |
| August 1-4, 1998 |
Chicago, Illinois |
| August 7-10, 1999 |
Orlando, Florida - Convention minutes |
| August 5-8, 2000 |
Ames, Iowa |
| August 3-6, 2001 |
St. Louis, Missouri - Convention minutes |
| August 8-11, 2002 |
Brookston, Indiana |
| July 31-August 3, 2003 |
Louisville, Kentucky - Convention minutes |
| July 29-August 1, 2004 |
Bloomington, Indiana |
| July 28-31, 2005 |
Lisle, Illinois - Convention minutes |
| July 27-29, 2006 |
Champaign, Illinois |
| July 12-14, 2007 |
Indianapolis, Indiana - Convention minutes |
| June 26-29, 2008 |
Terre Haute, Indiana |
| July 16-18, 2009 |
Denver, Colorado - Convention minutes |
| July 8-11, 2010 |
Terre Haute, Indiana |
| July 14-16, 2011 |
Columbus, Ohio |
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