When it comes to exploring Picasso, it would seem there is little left for curators to discover, despite his prodigious output. Right now, there are two major gallery exhibitions, at Gagosian and at Pace, as well as a show of Cubist works including Picasso from the Leonard Lauder collection at the Metropolitan Museum of Art.

But what few people realize is that Picasso’s sculpture is still relatively uncharted territory. The last show devoted to it in this country took place in 1967 at the Museum of Modern Art. B