On 3-4 November 2011 a scientific conference ''Curiosità, a bizarre concept'' took place in Warsaw. It was organized as a part of the celebration of the 25th anniversary of the Faculty of Historical and Social Sciences of the University of Kardinal Stefan Wyszyński in Warsaw, under the auspices of the Rector of the University, Father Professor Henryk Skorowski. The IRSA Institute was represented by dr. Jakub Adamski, who gave a lecture entitled "Bizarre Hybrid or Creative Innovation? Remarks on the Problem of the so-called Hall Churches with an Integrated Polygonal Choir in the Gothic Architecture".