Sonderaktion Krakau was a German operation against professors and academics of the Jagiellonian University and other universities in German-occupied Kraków, Poland, at the beginning of World War II. It was carried out as part of the much broader action plan, the Intelligenzaktion, to eradicate the Polish intellectual elite, especially in those centers (such as Kraków) that were intended by the Germans to become culturally German. It is not clear if Sonderaktion Krakau (special operation Kraków) was the actual German codename. The reason for the detention was communicated to professors in the concentration camp. Course of operation Soon after the establishment of the German occupation of Poland, following the invasion of Poland, on 19 October 1939, the Senate of the Jagiellonian University decided to open the university for a new academic year, which was to start on 13 November. This decision was communicated to German occupation authorities, who did not express objections. However, on 3 November, the Gestapo chief in Kraków Bruno Müller, commanded Jagiellonian University rector Professor Tadeusz Lehr-Spławiński to require all professors to attend his lecture about German plans for Polish education. The rector agreed and sent an invitation throughout the university for a meeting scheduled at the administrative center building in the Collegium Novum (entrance pictured). On 6 November 1939, in lecture room no. 66 (currently no. 56) at noon, all academics and their guests gathered; among them, 105 professors and 33 lecturers from Jagiellonian University (UJ), four from University of Economics (AE) and four from Lublin and Wilno. There were also 34 professors and doctors from University of Technology (AG), who did not intend to start the academic year, and attended their own meeting in a different room. The academics filled the hall but no Vortrag (lecture) on education was given. Instead, they were told by Müller that the university did not have permission to start a new academic year and that Poles were hostile toward German science and acted in bad faith. They were arrested on the spot by armed policemen, frisked, and escorted out. Some senior professors were kicked, slapped in the face (Stanisław Estreicher) and hit with rifle butts. An additional 13–15 university employees and students who were on site were also arrested, as well as the President of Kraków, Dr Stanisław Klimecki who was apprehended at home that afternoon. All 184 persons were transported first to prison at Montelupich Street, then to barracks