One of the top-ranked Croatian artists (currently 164th of all times /30.6.2018/).
Artfacts.net Global rank around the 2500-2600th place in 1997 based on the exhibition history.
His work in an ink is considered to be of vital importance for the global integrity of the Modern ink painting, and he is considered as one of the essential representatives of national and international present-day art, in particular of the New Ink Movement (New Ink Art).
Krupa graduated in 1995 at the Academy of Fine Arts, University of Zagreb (est. 1907 as the Royal College for Arts and Crafts (Croatian: Kraljevsko zemaljsko više obrazovalište za umjetnost i umjetni obrt). Krupa also studied Art History (non-degree research) at the University of Zagreb (1997,1998) and in 1998/99 as the postgraduate research student (The Monbukagakusho Scholarship (文部科学省奨学金 Monbukagakushō Shōgakukin)) at the Tokyo Gakugei University (東京学芸大学) or Gakudai (学大). LISTED ARTIST at the Kassel Documenta (european-art.net), the Getty ULAN, the Allgemeine Kunstlerlexikon (Artists of the World), the Whos Who in American Art 36th/current edition, the Arte Al Limite 38th edition, the Institute for Modern Art in Nurnberg (european-art.net), the Croatian Academy of Sciences and Arts (Dpt. Prints and Drawings), the Deutsche Fotothek in Dresden, the Central Institute for Art History in Munich, the MoMA/FF/Pratt Institute Artists Book Collection (not online), plus listed in the art libraries of the TATE in London, the Metropolitan Museum of Art in New York, the Art Institute of Chicago, the Museum of Contemporary Art in Zagreb (MSU), the Library of Congress in Washington, the Harvard University, the Princeton University, the Zurich University, the Zagreb University, the Rijeka University, the Split University, the Osijek University and the Zagrebački likovni umjetnici/The Zagreb Fine Artists portal, the Abstractart.gallery, the Choses a Savoir ART (podcast - Things to Know /about/ ART), the perceiveart.com, the Galerija Remek-djela (the Gallery of Masterpieces), the artprice.com etc....