The Sydney Opera House was officially opened
On the 20th October, 1973, the Sydney Opera House of Sydney, Australia, was officially opened by Queen Elizabeth II.
After regretting the problems caused by his invention of dynamite, Alfred Nobel established the prestigious Nobel Prize award for those who have contributed the greatest benefit to mankind.
On the 20th October, 1973, the Sydney Opera House of Sydney, Australia, was officially opened by Queen Elizabeth II.


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