Petrus Schaesberg

Petrus Graf Schaesberg (November 7, 1967 – September 22, 2008) was a German art historian, artist, editor, and teacher.
Biography.
In 2004, Schaesberg earned his Ph.D. (summa cum laude) at Munich's Institute of Art History, Ludwig Maximilian University. He taught at the Institute of Art History at Munich University, however he was never officially employed. At the time of his death, Schaesberg was an adjunct professor in the Art History department at Columbia University. Schaesberg's book, "Das Aufgehobene Bild", discussed collage as a mode of painting — from Pablo Picasso to Richard Prince.
On September 22, 2008, Schaesberg was found dead in the courtyard of his Morningside Heights, Manhattan apartment. According to the medical examiner's office, Schaesberg committed suicide by jumping out of the window of his 8th floor apartment.
Books.
Regensburg: Verlag Schnell & Steiner, Edition ICCARUS, 1999, 232 pages 
Paris: Edition ICCARUS / FNAC, 1999, 230 pages 
With essays by Rainer Crone, Joseph Leo Koerner and Alexandra Gräfin Stosch
New York: Prestel Verlag 1998, 160 pages
Munich: Prestel Verlag, 1998, 160 pages
Lyrical Worlds. The paintings of Nikolaus Hipp.
Regensburg: Schnell & Steiner, Edition ICCARUS, 1998
(German and English edition), 128 pages 
Essays.
"Alexandra Paperno. Star Maps"
NCCA (National Centre for Contemporary Arts), Moscow, 2007, pp. 5–14
"Stanley Kubrick. Inventor of Facts" in: Rainer Crone, Drama & Shadows,
London: Phaidon Press, 2005, pp. 242–246.
German Edition: Berlin: Phaidon, 2005
French Edition: Paris: Phaidon, 2005
Japanese Edition: Tokyo: Phaidon, 2005
"David Salle. Shattered Worlds. The Principle of Montage." in: David Salle,
Moscow: Stella Art Gallery, 2004, pp. 3–13.
"Andy Warhol. The Three Golden Rules of an Artist"
in: Pop Art. The John and Kimiko Powers Collection,New York: Gagosian Gallery, 2001, pp. 81–94
(with Rainer Crone) and with essays by Germano Celant, Jim Dine, Jeremy Gilbert-Rolfe, Judith Goldman, Dave Hickey, Linda Norden, Lane Relyea, Scott Rothkopf and David Shapiro
Ed.(with introduction) "Paul Klee und Edward Ruscha. Projekt der Moderne. Sprache und Bild."
Regensburg: Schnell & Steiner, Edition ICCARUS, 1998, pp. 9–19
"Andy Warhol. Heads (after Picasso)"
(English/German, Galerie Ropac, Paris/Salzburg, 1997
"Juan Usle. Ojo Roto"
Museu d'Art Contemporani, Barcelona, 1996
Exhibitions.
with ICCARUS