Belonging to neither the minimalist nor the abstract art movements but heavily influencing both, Constantin Brâncuşi spent his sculpting career returning to the same few themes—a kiss, a sleeping head, and a bird in flight—each rendered in pristine, simple, almost abstract forms. Perhaps the most famous example is Bird in Space (1923), a tall, slender bronze sculpture that arcs upward in a manner suggestive of flight but that otherwise lacks any identifiable characteristics of a bird. Despite the seeming simplicity of his works, the exacting standards to which Brâncuşi held his work meant that he produced relatively few pieces over his career. There is thus something of a disparity between ______blank