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The work of Nils Burwitz is represented in the following public collections and institutions, among others:
- Albertina, Vienna, Austria
- Albertinum, Dresden, Germany
- Anglican Church, Palma de Mallorca, Spain
- Biblioteca Nacional, Madrid, Spain
- Boston Public Library, Boston USA
- Bradford Museums and Art Galleries, Bradford, England
- British Museum, London, England
- Chase Manhattan Bank, New York, USA
- Church of Santa Eulalia, Palma, Mallorca, Spain
- Fitzwilliam Museum, Cambridge, England
- Kunsthalle, Hamburg, Germany
- Kunstkabinett, Frankfurt, Germany
- Kupferstichkabinett, Dresden, Germany
- Library of Congress, Washington USA
- Monestir de Lluc, Mallorca, Spain
- Musée National de Monaco, Monaco
- Museo de Arte Contemporáneo, Palma de Mallorca .. Spain
- Museo Centre Documentació Barcelonista,Barcelona, Spain
- Museum of Modern Art, Tokyo . Japan
- National Portrait Gallery, Washington .. USA
- New York Public Library, New York . USA
- Royal Carthusian Monastery, Valldemossa, Mallorca . Spain
- University of New York State, Buffalo, USA
- University of Texas, Austin, USA
- Victoria and Albert Museum, London, England
- National Gallery, Cape Town & 40 other public galleries, South Africa