Final answer:
When Edward Steichen imported Brancusi's 'Bird in Space', the U.S. Customs officer categorized it as a manufactured product, which resulted in import taxes being levied against it.
Step-by-step explanation:
When Edward Steichen attempted to bring Constantin Brancusi's sculpture Bird in Space into the U.S, the customs officer charged Brancusi with import taxes because he categorized the sculpture as a manufactured product. The U.S. Customs applied this designation because the artwork did not resemble a traditional statue or representation of the bird, leading them to view it as something other than art.
This led to a famous legal battle which brought into question the definition and recognition of modern art by the authorities, eventually leading to a revised notion of artistic works beyond traditional forms and into the realm of abstraction.