sentences:  In 2004 she was a visiting critic at Columbia University.In November 2009, the Whitney Museum of American Art opened a survey show of Horn’s work.Titled "Roni Horn aka Roni Horn", the show travelled to the Institute of Contemporary Art in Boston (2010),the Tate Modern, London (25 February - 25 May 2009), and the Collection Lambert in Avignon (21 June - 4 October 2009).