Marcus Antonius Jansen, (b. 1968, New York City), is a painter best known for his defaced “Faceless” portraits since 2012 and gestural provoking landscapes since the late 1990's has influenced a generation of viewing traditional portraits and landscapes differently.

"Avant-garde” has long described creatives who break aesthetic conventions. Yet it's true origins lie in the battlefield. A French term meaning “the advanced guard,” these are the souls who brave the front lines, becoming firsthand witnesses to human devastation. In his life and work, artist Marcus Jansen occupies both senses of the phrase. An Army veteran who went from serving in the Gulf War, to becoming a professional and critical artist, he paints surreal landscapes and portraits that excavate conflict and conquest, as well as their casualties and underlying power structures reexamining visual history.
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Marcus Jansen participated in his first international Biennale in 2007, at the 12th International Print and Drawing Biennale, in Taiwan at The National Taiwan Museum of Fine Art, curated by David Kiehl from the Whitney Museum of Art.

His first European solo museum exhibitions were held at the La Triennale di Milano Museum, in Milan, Italy, curated by Brooke Lynn Mcgowen Ph.D., and Rosella Faranotti, as a part of a traveling European museum tour, followed by two solo Museum exhibitions in Germany at the Kallmann Museum in Ismaning, Munich, and the Zitadelle Museum, in Spandau, Berlin, curated by Dr. Elmar Zorn, where his three-decade career was celebrated with an in-depth survey.

Following his European museum introduction in 2016, his first U.S., Museum debut was a spotlight at The Kemper Museum of Contemporary Art in 2018 with his show titled Deconstructing Marcus Jansen, curated by Jade Powell that investigated his stylistic techniques and placed him in dialogue with Robert Rauschenberg, William de Kooning, Roy Lichtenstein, James Rosenquist, David Smith, John Steuart Curry, Jim Dine and Romare Bearden.
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​The Rollins Museum of Art, in Winter Park, Florida, became Jansen’s first U.S. solo museum show curated by Dr. Gisela Carbonell in the United States, followed by The Baker Museum Artis-Naples, in Naples, Florida with his show titled Marcus Jansen Two Decades of Relevance, curated by Courtney McNeil and Rangsook Yoon.
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Jansens work has been noted in numerous international publications, including The Guardian, New York Times, New York Times Magazine, Boston Globe, Rolling Stone, Architectural Digest, La Repubblica, ARTNOW by Noblesee, Juxtapoz, Art News, Vanity Fair and New American Paintings.

Jansens Public collections include, The Bronx Museum of the Arts, The Baker Museum, The Moscow Museum of Modern Art, (MMOMA), The New Britain Museum of American Art, The Kemper Museum of Contemporary Art, The Rollins Museum of Art, The University of Michigan Museum of Art, The Foundation Calosa, The PERMM Museum of Contemporary Art, The National Taiwan Museum of Fine Art and The Housatonic Museum of Art.