It is becoming harder and harder to distinguish public collection spaces from commercial galleries. Dealers with big pockets have sought to rub off from the cachet of museums by conscripting starchitects to design impressive exhibition halls and hire museum curators. They add bookshops and cafés, publish shiny exhibition catalogues and provide over-explanatory walltext. “Non-selling” exhibitions are of course a marketing tool to get you into the gallery, even better if you can secure a collector-client to curate a show of her own works for you. Cynicism aside, Hauser & Wirth’s sprawling Arte Povera exhibition curated by German collector Ingvild Goetz is well worth a visit. Spread over three floors in the old Dia building, the show includes rare treasures by ‘I Poveristi’ stalwarts like Alighiero Boetti, Jannis Kounellis, Mario Merz, Guiseppe Penone, Michelangelo Pistoletto, and Emilio Prini. Lacking a thematic thread, visitors are on their own to scout out such masterpieces like Pistoletto’s L’Etrusco from 1976, Alighiero Boetti’s Mappa from 1988, or Jannis Kounellis’ gold leaf shoes. Exit through the gift shop and pick up the book of the collector’s thoughts on collecting expensive art and, if the non-elitist credo of Arte Povera in this context leaves a bit of a stale taste in your mouth, you can always wash is down with a freshly squeezed organic juice at the adjoining café. At Hauser & Wirth through October 28.