Built in 1999, The Center for Science and Industry in Columbus, Ohio is a masterpiece of precast technology, demonstrating what lengths a precaster can go to work with an architect and move the technology of precast design to the next level. The precaster worked closely with architect Arata Isozaki to form a new type of precast panel that took on new dimensions and heights in architectural precast. The 158 precast concrete panels that form the outer walls took about 33,000 hours to design, engineer, construct and erect.

The Sydney Opera House is an amazing structure that serves as a landmark to the city and its architecture. The story of its design by Danish architect Jørn Utzon in 1957  and its storied construction are worthy of a Hollywood script, with equal parts intrigue, charismatic personalities and technical innovation that took 16 years to complete. But the precast components that create the iconic "sails" are what lands it on my personal "Seven Wonders" list.