part in the National Exhibition of Young Art entitled "Against War – Against Fascism", also known as "Arsenal", which turned out to be a generational exhibition of artists opposing the style of socialist realism. The artists he met there, including Andrzej Wróblewski, Tadeusz Dominik, Magdalena Więcek, Marian Bogusz, Rajmund Ziemski, Jerzy Tchórzewski, Jacek Sempoliński and Alina Szapocznikow, have become long-time friends of Gierowski. Soon these artists were to become the leading art figures of their generation. In January 1957, the artist exhibited his works for the first time at the Krzywe Koło Gallery, thus beginning a long and fruitful cooperation with Marian Bogusz and the Gallery's artistic circle. Whereas in February of the same year at the General Meeting of Delegates of ZPAP districts Stefan Gierowski was elected as a secretary. Together with the newly elected board, which included Jan Cybis, the President of the Association, and privately his friend, he started working on the new statute of ZPAP. The statute was completely reorganised and political or socialist elements were removed from it. His task was to reorganize the exhibition and popularization structures and animate artistic life in the country. Thanks to Gierowski's efforts, several dozen exhibition spaces subordinate to the association were opened throughout Poland. In the same year 1957, which proved to be a turning point for the artist's work, Gierowski began a series of Paintings numbered with Roman numerals. These works, shown at the Second Modern Art Exhibition at the Zachęta National Gallery of Art, brought the artist wide recognition among critics, including Julian Przyboś and Zbigniew Herbert.. In the following years, Stefan Gierowski, together with Aleksander Wojciechowski and Marian Bogusz, joined the organizing committee of the Confrontation 1960, an event organized by the Krzywe Koło Gallery, which was summed up on 8 September 1960 during the 7th Congress of the International Association of Art Critics (AICA). Together with Bogusz and Wojciechowski, he was responsible for the programme of the Confrontation, and also exhibited his own works as part of one of the exhibitions. During the late 1950s and early 1960s, Stefan Gierowski repeatedly exhibited his works abroad – he participated in such artistic events as the first Biennale de Paris (1959), the 5th International Biennale of Contemporary Art in São Paulo (1959) and 15 Polish Painters at the Museum of Modern Art in New York (1961). As a result of the success of Polish artists at