View asset onlyOCTOBER 09, 2013: Opera House legend Steve Tsoukalas (an employee since 1965) uses his special techniques - olive oil to clean the brass and a baking soda recipe for the concrete, approved by Utzon himself - to keep the building resting under 1,056,006 roof tiles in pristine shape. 24-hours-in-the-life-of story about the Opera House. Behind the Scenes Opera House. (Photo by Stephen Cooper / Newsphotos)Date Created:09 October, 2013Reference number:NP57918Photographer:Stephen CooperAdd to cartPrint Prices Start At $AUD 30.00 (Inc. GST)