Dating back to the 1970s, and including her recent research in the fields of video, sound and fiction. In her artistic practice, she combines the heritage of conceptual art and alternative systems of knowledge and cosmogonies (e.g. mystical rituals, paranormal phenomena and supernatural forces). The interactive installation Die Gedanken sind frei [Thoughts are free], originally presented at Documenta 13 in 2012, is one of her most impressive works and incorporated the Serralves Foundation collection in 2013.
Using a jukebox and sitting on seats designed by the artist, audiences can listen – in whatever order they choose – to 100 songs with political content, collected by Susan Hiller. The songs come from many different parts of the world and cultures, ranging from the 1524–25 Peasants' War in Germany to the 2011 Arab Spring. The songs’ lyrics can be found on the walls around the jukebox and spectators also have access to a "songbook" selected by the artist that compiles the song lyrics, texts and images.