More to explore:
Sydney Opera House analogy cornette wimple
"The Sydney Opera House TotallyLooksLike.... the Flying Nun's hat." by jlgrand62
Audrey in Sydney Opera House hat
Max Dupain, Sydney Opera House, 1969
sydney4 by Flickr user Orla Cahill Millinery
Sydney Opera House Australian Aboriginal dot style Painting on Canvas 88 x 45 cm | eBay
Ken Done, White Opera House Yellow Sky
Ken Done 'Bridge and Opera House by Night I' painted in 2003.
OB wears opera house hat, via Flickr.
Ken Done, Night Bridge Opera House 4