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The computer's ability to immerse a user in virtual image spaces "is not the revolutionary innovation its protagonists are fond of interpreting it to be," Grau writes. "The idea of virtual reality only appears to be without a history; in fact, it rests firmly on historical art traditions." Grau (lecturer in art history at Humboldt University in Berlin, associate professor at the Kunstuniversitat Linz in Austria and leader of the German Science Foundation's project on immersive art) traces the lineage of virtual reality as far back as the frescoes of a villa in Pompeii.