Thaddeus Holownia RCA ONB FRSC (born July 2, 1949)[1] is a British-born Canadian artist and professor.

[2][4][5] In Holownia’s large-scale photographs, he uses the idea of heightened perception to explore the traces humankind leaves on the landscape.

[5] An early series Holownia shot in Toronto features people posing with cars in urban areas that had been abandoned in favour of car-friendly suburbs.

[5] His photographs have been the subject of numerous exhibitions, including a forty-year retrospective, The Nature of Nature, The Photographs of Thaddeus Holownia 1976–2016, at the Art Gallery of Nova Scotia; The Terra Nova Suite, a 25 year survey of his work in Newfoundland & Labrador at the Provincial Gallery (The Rooms) in St. John's, Newfoundland; 24 Tree Studies for Henry David Thoreau at the Beaverbrook Art Gallery in Fredericton, New Brunswick, and the Heckscher Museum in Huntington, New York.

[9] His 1998 retrospective exhibition, Extended Vision: Photographs by Thaddeus Holownia 1978–1997, organized by the Canadian Museum of Contemporary Photography, traveled across Canada and to the Centro de la Imagen in Mexico City.