Irreverence is such a cheap commodity these days, available everywhere, that it can be difficult to imagine a time when an artist's nose-thumbing act could be termed radical. That's why Gagosian Gallery's retrospective of the impish Piero Manzoni, an Italian provocateur who ushered in conceptualist hijinks almost 50 years ago, feels less a tribute to ground-shifting work than a nostalgic tour of a more earnest era. The art is enjoyably quaint, and even a little melancholy, considering Manzoni's... More >>>