Groupe Mobile

Groupe Mobile is a term Brancusi attributed to the configurations of sculptures and their bases which he continually re-arranged and photographed in his studio constituting an ongoing visual journal of his work.

Being essentially a subject that cannot be treated ‘realistically’, the tree offers a marvellous pretext for the fabrication of a rhythmic structure of shallow recessions and advances that have little or nothing to do with the void and solid of the original motif

—Bridget Riley, introduction to ‘Mondrian; Nature to Abstraction’