The book “Developments in Structural Form” by Rowland Mainstone is a history of the development of structural design over thousands of years. The very first 20th Century building structure appearing in that book is the Sydney Opera House, which was opened on 20th October 1973.
To mark the occasion here is a music video featuring Tim Minchin:
… and an interview with Peter Thompson, who worked on the construction of the project, produced by Engineers Australia: