Garau’s invisible sculpture “Buddha in Contemplation” at the Piazza Della Scala in Milan, Italy. “Buddhist art”, explains Hans-Georg Moeller, “just like Daoist art, has been depicting emptiness for more than a thousand years since this notion is so central to both these philosophical and religious traditions.” The marking does not so much serve the purpose of preventing passers-by from accidentally running into the sculpture – it wouldn’t do it any harm – but rather guarantees the visibility of the work, not unlike the temporal frame that John Cage, for example, requires for 4’33”, or the exhibition frame that saved Duchamp’s “Fountain” from being mistaken for a urinal – two examples of a modern art tradition within which Moeller also locates Garau.