In 1976, the International Wittgenstein Symposium was founded by Elisabeth Leinfellner, Werner Leinfellner, Rudolf Haller, Paul Weingartner, and Adolf Hübner in Kirchberg am Wechsel, Lower Austria. The location was chosen because in the 1920s, Ludwig Wittgenstein taught at elementary schools in the area surrounding Kirchberg am Wechsel. On the 24th to the 25th of April, 1976 (just prior to the 25th anniversary of Wittgenstein's death), the first conference took place. Only four of the five founders gave talks on his philosophical work at the first meeting, but at the second, 120 speakers attended from around the world.
The general topic of each symposium centers around the philosophy and philosophy of science of Wittgenstein, but the specific topics change from year to year. For example, the topic of the second International Wittgenstein Symposium was "Wittgenstein and his impact on contemporary thought" and the topic of the third symposium was "Wittgenstein, the Vienna Circle, and critical rationalism (including a seminar on Popper'sopen society)." A survey of topics is available from the site of the Austrian Ludwig Wittgenstein Society.