Born in 1939, HA Schult believes that 'art is life and life is art'. The conceptual artist, from Germany, has often focused on Western consumerism in his large-scale and impressive works, using people's trash in the process. Take a look at this piece that he created back in 2001. 'Love Letters Building' is a building covered entirely in love notes. After putting out a call, he received around 150,000 love letters written by people from all walks of life. Schult used 35,000 of these to cover the outside of this old post office building in Berlin! Wow!