Bird in Space is Constantin Brâncuși’s polished sculpture of a bird reduced to a soaring, elongated form.
Brâncuși developed the series from 1923 onward in several marble and bronze versions. Instead of depicting feathers, wings, or a recognizable bird in detail, he emphasized the sensation of flight through a smooth, narrow silhouette that rises from a tapered base.
The work became famous in the United States after a 1926 exhibition at the Brummer Gallery in New York. Customs officials initially classified it as a manufactured metal object rather than art and imposed a tariff, prompting a legal dispute over the meaning of sculpture.
The case, Brâncuși v. United States, ended in 1928 with the court accepting the work as art. That decision became an important landmark in the legal and cultural acceptance of abstract sculpture.