Second Conference on the Epistemology of the Exact Sciences
The second Conference on the Epistemology of the Exact Sciences (German: 2. Tagung für Erkenntnislehre der exakten Wissenschaften in Königsberg) was held on 5–7 September 1930 in Königsberg, then located in East Prussia.
Source: Wikipedia — Second Conference on the Epistemology of the Exact Sciences (CC BY-SA 4.0)