Maciej Matthew Szymanski (26 February 1926, Warsaw – 5 May 2015, Vancouver, British Columbia, Canada) was a member of the Polish Underground Army during World War II (nom de guerre 'Kruczkowski'), an officer in the Polish paramilitary organization NSZ, participant in the Warsaw Uprising of 1944 at the age of 18, Canadian architect, draughtsman, and author of self-published memoirs and essays in his retirement.