Jørn Utzon, the Danish architect behind the Sydney Opera House, died on November 29, 2008.

Utzon travelled the world collecting inspiration and references for his projects, and this can be seen throughout the inventive silhouettes and layouts of his work.
Jørn Utzon designed mainly through the 1960s, 70s, and 80s, with a huge portfolio of work ranging from private residential spaces to large-scale public spaces.
From small houses to iconic masterpieces, Utzon’s work is always unexpected, playful, and inventive.
Six Important Buildings to Know by Danish Architect Jørn Utzon

In 2007, the Opera House was declared a UNESCO World Heritage site:

Inaugurated in 1973, the Sydney Opera House is a great architectural work of the 20th century that brings together multiple strands of creativity and innovation in both architectural form and structural design. A great urban sculpture set in a remarkable waterscape, at the tip of a peninsula projecting into Sydney Harbour, the building has had an enduring influence on architecture. The Sydney Opera House comprises three groups of interlocking vaulted ‘shells’ which roof two main performance halls and a restaurant. These shell-structures are set upon a vast platform and are surrounded by terrace areas that function as pedestrian concourses. In 1957, when the project of the Sydney Opera House was awarded by an international jury to Danish architect Jørn Utzon, it marked a radically new approach to construction.
Sydney Opera House – UNESCO World Heritage Centre

The Opera House has been featured on numerous stamps from around the world. In 2016, Denmark released a tribute to both Utzon and his now iconic Opera House design. Of course, Australia has featured it as well. 

Jørn Utzon
From the Famous Danes 2016 series
Issued by Danish post office in 2016

Sydney Opera House, 1973
From the Landmarks: Modernist Australian Architecture series 
Issued by Australia in 2007
Designed by Gary Domoney