The Guggenheim Bilbao Museum hosts Serra-Brancusi, the most ambitious exhibition to date on the work of Constantin Brancusi (1876–1957) and Richard Serra (1939) from Oct 8, 2011 to April 15, 2012. These two people were the greatest sculptors of the 20th century.

The show examines the connections between these two pioneers of sculpture through nearly fifty works, offering a unique overview of the period of over one hundred years in which modern sculpture developed. It includs sculptures as "Birds", "The Kiss" and "Sleeping Muse" by Constantin Brancusi, and "The consequence of consequence" by Richard Serra".