|Genre||Experimental music, contemporary classical music|
|Years active||1956, 1958–1981, 1983–present|
|Founded by||Tadeusz Baird and Kazimierz Serocki, Head Board of the Polish Composers' Union|
Warsaw Autumn (Warszawska Jesień) is the largest international Polish festival of contemporary music. Indeed, for many years, it was the only festival of its type in Central and Eastern Europe. It was founded in 1956 by two composers, Tadeusz Baird and Kazimierz Serocki, and officially established by the Head Board of the Polish Composers' Union. It is an annual event, normally taking place in the second half of September and lasts for 8 days.
The first festival took place in 10–20 October 1956. In 1957 and 1982 there was no festival.
The first years of the festival, reaching back to the late 1980s, was a period of particular magnificence. From the beginning of its existence the festival's program foundations were clear. The festival's leading aim was (and is) to present new music from Poland and around the world. Adrian Thomas notes that the music performed at Warsaw Autumn between 1958 and 1961 "clearly charts the process of informing Polish audiences and composers of what was happening in the West (Thomas 2005, 89). At the same time, the amount of Polish repertoire increased from 25% in 1958 to 30% in 1961 (Thomas 2005, 90).
The Polish Composers' Union still plays a large role in the organisation of the festival, and the director of the festival is currently Jerzy Kornowicz.
The Warsaw Autumn featured many Polish and World premieres by both non-Polish as well as Polish composers. The following list includes some of the pieces that were performed (Thomas 2005, 320–31).