Throughout this period, the Met under de Montebello's leadership mounted some 30 special exhibitions annually, involving not only all the museum's 17 curatorial departments, but also presenting works of art on loan from public and private collections around the world (current shows listed on the museum's website, metmuseum.org). Many of the shows were accompanied by the publication of major catalogues. Under de Montebello, the Met has become the leading art book publisher in the U.S., issuing some 25-30 illustrated volumes each year, most carrying an introduction by the director.