Lorentowicz was born in Pabianice, in present-day central Poland, in 1868, five years after the opening of the Polish 1863 Uprising that was eventually suppressed by the Russian Imperial Army. His parents had moved to present-day central Poland from the old eastern Kresy borderlands, escaping poverty and oppression. Jan obtained his secondary-school diploma at Płock by way of home schooling and soon went to France, where he lived until 1903 and studied at the Sorbonne. While in Paris, he became editor-in-chief of Pobudka in 1891, and on 17 November 1892 took part in an assembly leading to the founding of the Polish Socialist Party. A major controversy surrounded the Paris conference, regarding the potential use of terror by the PPS. Supporters of such violence against the Russian governorate included Aleksander Dębski, but the idea did not take hold and no terror attack took place in the following decade. In 1903 Lorentowicz returned to Poland and settled in Warsaw. He joined the editorial board of Kurier Codzienny as managing editor about the time of the Polish Revolution of 1905, and in 1906–18 served as literary editor of Nowa Gazeta. He co-founded the Polish Society of Writers and Journalists in 1909 and served as its president, 1916–18. Poland's freedom was in the air. In 1916–22 Lorentowicz was director of the Warsaw School of Drama and, in 1918–22, executive director of the Warsaw City Theatres. In 1919 he published a three-volume collected works of the 16th-century poet Jan Kochanowski, who had founded Polish literary language; in 1925 the book on Władysław Reymont, commemorating Reymont's Nobel Prize in Literature; and the same year became president of the Polish PEN Club after the death of Stefan Żeromski. In 1926–28 Lorentowicz served as director of Warsaw's National Theatre, and in 1935 he completed the publication of his monumental five-volume monograph, Dwadzieścia lat teatru, comprising some 480 collected articles. In 1938 he was elected a member of the Polish Academy of Literature after the untimely death of Piotr Choynowski and Bolesław Leśmian. He continued publishing until the Nazi German invasion of Poland, and died in Warsaw in mid-January 1940. Lorentowicz was buried in the city's Powązki Cemetery.
Legacy
Jan Lorentowicz received many awards for his contributions to theatre and its history, including the French Legion of Honour and the Polish Order of Polonia Restituta. He was well known for his vast collection of books, some rare and expensive. He was a Renaissance man with broad interests and accomplishments. Immediately after World War I he participated in rebuilding theatre in Poland's capital. His Dwadzieścia lat teatru is a primary source of information on the history of Warsaw theatre in 1904–34. To this day, Poland's interwar actors and cultural luminaries are best remembered through his monographs, including Spojrzenie wstecz, Dzieje teatru w Polsce, and Teatr Polski w Warszawie. In 1989 the Pabianice public library was named for him. The memoirs of Lorentowicz's daughter – writer, teacher and award-winning set-designer Irena Lorentowicz – Oczarowania show Jan Lorentowicz as a remarkable father. Irena, who never married, inherited part of his library. In old age demented and alone, she was found by a friend in the middle of her small Warsaw apartment, cutting up books with scissors into a pile of scraps. She died in 1985 and was buried near her father.
Works
Jan Lorentowicz, Polska pieśń miłosna: antologia, book, 8 editions
Jan Lorentowicz, Ziemia polska w pieśni: antologia, book, 6 editions
Jan Lorentowicz, Polska pieśń niepodległa; zarys literacki, book, 3 editions
Jan Lorentowicz, Dzieła polskie Jana Kochanowskiego: wydanie kompletne, book
Jan Lorentowicz, , book, 6 editions
Jan Lorentowicz, Dwadzieścia lat teatru, book in 4 volumes, 5 editions
Jan Lorentowicz, La Pologne en France; essai d'une bibliographie raisonée, book, 5 editions
Jan Lorentowicz, Spojrzenie wstecz, book, 12 editions in 3 languages
Jan Lorentowicz, Teatry w stolicy i inne artykuły, book, 4 editions
Jan Lorentowicz, Teatr Polski w Warszawie, 1913-1938, book, 2 editions
Jan Lorentowicz, Młoda Polska, book in 3 volumes
Jean Lorentowicz, Littérature, Théâtre, beaux-arts, book, 3 editions
Jan Lorentowicz, La Pologne en France: essai d'une bibliographie raisonnée. Avec la collaboration de A. M. Chmurski. II Encyclopédies, langue, voyage, histoire, book, 1 edition
Jan Lorentowicz, Nowa francya literacka: portrety i wrażenia, book, 3 editions
Jan Lorentowicz, Géographie, sciences, droit, suppléments, book, 2 editions
Jan Lorentowicz, Wielcy poeci romantyczni Polski: Mickiewicz, - Słowacki, -Krasiński by Gabriel Sarrazin, book