Jorge Oteiza (b. 1908, Orio, Spain; d. 2003, San Sebastián, Spain) is one of the preeminent Basque artists in the Guggenheim Museum Bilbao collection. The museum owns a group of sculptures Oteiza created between 1957 and 1958 that exemplify his “experimental families,” the series he used to explore the three-dimensional world by hollowing out geometric shapes like cylinders, spheres, and cubes.