Reich, Steve. (b. 1936) & Richter, Gerhard. (b. 1932) Signed ProgramOriginal concert program and ticket from a 2009 concert exhibition collaboration between the American composer and the German artist, signed on the cover by both Reich and Richter, as well as by photographer Benjamin Katz. The concert took place on January 27, 2009 at the Museum Ludwig in Cologne, where Reich and three percussionists from the Ensemble Modern performed DrummingPart One in an exhibition of Richter's paintings, and continued an hour