Alexander Calder was known for his grand sculptures and abstract art. In 1958, Calder unveils his latest sculpture, a 28x28 foot mobile called "Pittsburgh." Calder being a Philadelphia native, constructed this mobile from aluminum and iron to be representative of the state’s industrial-heavy history. After its debut at the 1958 Carnegie International exhibition, it was bought by a private collector and donated to Allegheny Country, who then installed it in the Greater Pittsburgh International Airport. It is all down-hill from here, the county executives defaced the sculpture by painting it green and yellow along with altering the immobilizing the "mobile" and adding a motor to make it move once again. Calder was outraged with what they had done to his creation, county executives settled on painting the mobile Calder Red, but after diluting the paint too much it turned out pink! It then took about 34 years after its debut to be returned to its original glory as a black and white mobile made of aluminum and iron.