John Baldessari – Graduation, Eiserner Vorhang (Iron Curtain) 2017-18, Vienna State Opera, Vienna, Austria
Maria Lassnig – Frühstück mit Ohr (Breakfast with Ear), Eiserner Vorhang (Iron Curtain) 2005-06, Vienna State Opera, Vienna, Austria
Cy Twombly – Bacchus, Eiserner Vorhang (Iron Curtain) 2010-11, Vienna State Opera, Vienna, Austria
Franz West – Drei— Vom Vorgang ins Temperament, Eiserner Vorhang (Iron Curtain) 2009-10, Vienna State Opera, Vienna, Austria
“Safety Curtain” is an exhibition series conceived by museum in progress, which has been transforming the safety curtain (176 square meters) of the Vienna State Opera into a temporary exhibition space for contemporary art since 1998. [source]