Piotr Odmieniec Włast (25 June 1876 – 8 March 1949 in Izabelin; until 1907: Maria Jakubina Komornicka) was a Polish writer of Young Poland period, translator and literary critic.

The writer published poetry, including series Czarne Płomienie (1901), prose (Biesy, 1902), translations from English, as well as reviews, signed "Włast".

According to Maria Dernałowicz,[4] 1907 in the Bazar Hotel in Poznań (during a trip with mother to Kołobrzeg[1]) Włast burned women's dresses in the oven and declared himself a man.

In 1914 Włast returned to Grabów, to begin writing his last work, Xięgi poezji idyllicznej (Books of Idyllic Poetry).

In the 21st century, Włast's renaissance took place – feminist critics,[6] LGBT scholars,[1] and journalists[7][8] became interested in the writer's life and work.

[1] Tomasik wondered in his book: "The question remains whether Włast in his metamorphosis was more concerned about becoming a man or simply a human" as at that time a woman was in fact a sub-human being, which was also pointed out by, among others, Zofia Nałkowska.

[9] In July 2016, Warka celebrated the 140th anniversary of the birth of Maria Komornicka with the participation of Brygida Helbig and Tomasz Komornicki.