EVENT DETAILS Presented by the American Poster Institute (API), Flatstock displays the works of the world's top gig poster artists. About this Event Flatstock 73 features posters of varying styles, colors, and techniques for sale by the talented artists who created them. The best concert posters have always captured both the essence of the music they promoted and the spirit of the time in which they were produced. Flatstock provides an ongoing series of opportunities to see fine poster art in person and to meet the artists who created it. Coming back for 2020, the Flatstock Stage features performances from some of our talented official Showcasing Artists. The Flatstock Stage is the perfect spot to check out up-and-coming acts and unwind in between your poster pursuing. Flatstock is free and open to the public as well as all SXSW registrants.