In Summer 2011 "Symphony of a missing room" was performed at Salzburger Festspiele by the artist duo "Lundahl & Seitl". They were awarded with the "young directors project price". The premier was already in 2009 at the "National Museum Stockholm". For more details of "Salzburger Festspiele" and on my website have a look at the links below.
http://www.salzburgerfestspiele.at/ydp2011_en/SymphonyofaMissingRoom.html
http://www.julareindell.com/en/kostuembild/art/symphony-of-a-missing-room