The Kraft Circle was a student society of philosophers at the Institut für Österreichische Geschichtsforschung of the University of Vienna devoted to "considering philosophical problems in a nonmetaphysical manner and with special reference to the findings of the sciences".
[1] Its chairman and leading professor was Viktor Kraft, a former associate of the Vienna Circle, to which the Kraft Circle is sometimes viewed as a post-Second World War extension.
[2] The club was founded in 1949 by science and engineering students interested in the philosophical foundations of their disciplines.
[3] The members were mainly students, but there were occasional faculty attendees and even "foreign dignitaries" made appearances.
Feyerabend's paper "An Attempt at a Realistic Interpretation of Experience" (Proceedings of the Aristotelian Society [1958]) is "a condensed version of the discussions in the Kraft Circle".