Hans Ulrich Obrist (b. 1968) is a world-renowned curator and the artistic director of the Serpentine Galleries in London. Alongside his curatorial practice, Obrist has written extensively on and around contemporary art, with a particular interest in the interview format.When he's not travelling the world to ‘invade’ it with his pixelated mosaics, Invader exhibits his work in galleries and museums, and makes books and objects. As an enigmatic character, he operates anonymously and always appears masked.