Van Gogh is one of the artists best known to the average undergraduate, and thus a favorite choice for papers. There's now a great new resource available for everyone from freshman enthusiast to advanced specialist: a digital edition of all 902 extant letters from and to Vincent van Gogh is now online at http://www.vangoghletters.org. The site provides transcriptions of the original Dutch or French text, a translation into English, a full zoomable facsimile, and comprehensive annotation. There are also some 2000 illustrations of the works of art discussed in the letters.
This edition, based on fifteen years of research, was edited by Leo Jansen, Hans Luijten and Nienke Bakker of the Van Gogh Museum, in association with the Huygens Institute. (Editorial procedures are explained under 'About this edition'. A six-volume book edition is published in three languages (Dutch, French and English). More information about the books is available at http://www.vangoghletters.org/vg/bookedition.html.