Richard Serra Drawing: A Retrospective opens at the Metropolitan Museum of Art in New York on Wednesday, April 14th. His sketches are the mental blueprints to his massive steel sculptures, and are drawn in thick grease crayon laid out in blocks of flat black. The show includes work from Serra's early days in the ’70s to more recent sketches of his work for Bilbao Guggenheim. Of note are his sketches for Tilted Arc and US Government Destroys Art. These were for Serra's 1981 sculpture that was removed from the Manhattan Federal Plaza for obstructing the entrance and being an "eyesore." [Metropolitan Museum of Art]