ポーランド派
Finally in 1949 he moved to Warsaw, where he became a member of Teatr Współczesny, one of the best Polish stages at the time, led by renowned director Erwin Axer. About that time he also debuted as a playwright, with two of his plays staged in Kielce and Kraków. He was also engaged in the National Theatre in the role of Kordian in Juliusz Słowacki's play of the same title, which gained him much popularity and fame. He was also admitted to the National Theatre Academy (Akademia Teatralna) in Warsaw and graduated from the Directors' Division in 1956. In 1955 he played the first major role in a film appearing in Andrzej Wajda's "A Generation". This film, undoubtedly the first major production of Wajda, led to ever-increasing popularity of Łomnicki, who started to be regarded as one of the most notable actors of the so-called Polish Film School. The following years he also appeared in most major films screened by the Polish Film School movement members, among them in Wajda's "Innocent Sorcerers" (1960), "Heroism" by Andrzej Munk (1958) and "Depot of the Dead" by Czesław Petelski. In 1969 he appeared in his most famous films, the "Colonel Wolodyjowski" and "The Deluge" by Jerzy Hoffman, the latter being nominated for the Best Foreign Film Oscar in 1974. He also won the award for Best Actor at the 6th Moscow International Film Festival.