From her Manhattan skyscraper studio, the grande dame of American Modernism painted the city below with aplomb

We discuss O'Keeffe’s deeply personal renderings of Manhattan cityscapes and skyscrapers, plus look back at Studio Voltaire’s achievements and talk to a curator about a bold Jungwirth still life

Indiana-based Valparaiso University is reportedly hoping to raise $20m with the sale of works by O’Keeffe, Childe Hassam and Frederic Church from its museum’s collection

Last year, the late Microsoft co-founder’s art collection brought in a record $1.6bn over two auctions

Museum associations and the university’s former art department chair have spoken out against the planned deaccessioning

All you ever wanted to know about O’Keeffe, including a comprehensive biography, the artist’s “perfect” novice recipe book, and her letters to photographer Alfred Stieglitz—selected by the curator Theodora Vischer

Our pick of highlights from this week's auctions and fairs

A show opening at the Clark Art Institute reveals how Georgia O’Keeffe thwarted her sister’s career in art

Christie's American art sales this week realise a new record for Hartley but Sotheby's struggles to get the pricing right on Hopper's Shakespeare scene

Bumps caused by chemical reactions can now be mapped by waving a hand-held device that one professor likens to a Star Trek “tricorder”

A monumental painting of the American West by Emanuel Leutze breaks records while works by Rockwell and Hopper flop

With only two lots unsold, the auction house nets $362.6m in evening of avid bidding

Modernist works from the Georgia O’Keeffe Museum will be offered in New York in November