3 Nights in Oslo is a five-disc live box set album by the Peter Brötzmann Chicago Tentet + 1, led by saxophonist Brötzmann, and featuring an eleven-piece ensemble. It was recorded during February 19–21, 2009, at Victoria, Nasjonal Jazzscene in Oslo, Norway, and was released on CD in 2010 by the Norwegian Smalltown Superjazzz label. On the album, Brötzmann is joined by saxophonists Mats Gustafsson and Ken Vandermark, trumpeter and saxophonist Joe McPhee, trombonists Jeb Bishop and Johannes Bauer, tubist Per Åke Holmlander, cellist Fred Lonberg-Holm, double bassist Kent Kessler, and drummers Paal Nilssen-Love and Michael Zerang. The entire ensemble is heard on discs 1 and 5, while the remaining discs feature duo, trio, and quartet combinations.