de Montebello's other major building programs have included the expansion and renovation of period rooms and galleries for the decorative arts, the opening of new permanent exhibition galleries for drawings, prints, and photographs (supplemented in 2007 with the new Joyce and Robert Menschel Hall for Modern Photography), the conservation and installation of the Gubbio Studiolo, the opening of the Antonio Ratti Textile Conservation Center, the opening of the new Mary and Michael Jaharis Gallery for Byzantine art, and the installation of Coptic art in a crypt-like gallery carved out of former storage space beneath the museum's Great Hall staircase.Under de Montebello's directorship, the Met acquired many major private collections, notably the Jack and Belle Linsky Collection of European Paintings, sculpture, and decorative arts; the Heinz Berggruen collection of works by Paul Klee; the gift of 10 paintings by Clyfford Still by the artist's widow; the Annenberg Collection of Impressionist and Post-Impressionist paintings; the Florene Schoenborn collection of 20th-century works; the Jacques and Natasha Gelman Collection of modern paintings; the Gilman Paper Company Collection of 19th-century photographs; the Muriel Kallis Steinberg Newman Collection of Abstract Expressionist and other modern works; and most recently, the Diane Arbus archive.