Peter Bengtsen is giving a talk on street art in Tartu, Estonia on 26 April 2015. The talk is part of the annual <link https: www.facebook.com stencibility>Stencibilty Festival. The talk is entitled "Street art's explorative potential". It discusses the role played by the open, unsanctioned and temporary nature of street art in promoting a critical attitude in the viewer towards public space. This theme is also discussed in Bengtsen's book  <link https: www.academia.edu bengtsen_p._2014_._the_street_art_world street art>"The Street Art World" (2014), as well as in his article  <link http: www.tandfonline.com eprint cep4axaapnn4zje7keun full the public art>"Beyond the Public Art Machine" (2013), currently available as Open Access.