A perfect pairing… Titled, Ghost, this evocative mobile by the late great sculptor Alexander Calder hangs in the Philadelphia Museum of Art’s Great Stair Hall, serving as a strangely pleasing pendant to Augustus Saint-Gaudens’ sculpture of Diana (1892-3). The ever-in-flux installation was originally made as a centre piece for Calder’s 1964 exhibition at the Guggenheim Museum in New York, but later found its way back to the sculptor’s hometown, where he was born in 1898.
