A small treasure trove of first-rate collages awaits at the elegant townhouse gallery of Luxembourg & Dayan. The exhibition is loosely organized around the self-explanatory topic of “The Edge”. It opens with Jack Goldstein’s superbly uncanny video “The Knife” from 1975 and moves along two more floors with treasures such as Jean Arp’s, Levre from 1926, Picasso’s Composition au verre. Nature morte au verre et raisins from 1914, several noteworthy Ellsworth Kelly Postcard collages, Cindy Sherman’s Doll Clothes, Rene Magritte Les fênetres del l’aube from 1928, a stunning recent collage by John Stezaker called Mask, Max Ernst’s Dada piece from 1929 La femme 100 têtes and many more. Here is a beautiful assemblage by Italian painter, poet and Futurist Giacomo Balla, Compenetrazione Bis from 1913. At Luxembourg and Dayan through April 15.