Agnes Martin

Top shows to see in New York during Frieze week

From Eva Hesse and Hannah Wilke at Acquavella Galleries to Deana Lawson at the Guggenheim

A new catalogue raisonné organisation aims to foil fakes in the art market

The membership-based International Catalogue Raisonné Association will offer discounted legal advice and institute an annual conference

TateArchive

Tate receives US boost as major patrons donate Salle, Steinbach, and Martin

American patrons have recently been very generous to the gallery, with both their art and their funds