The Smithsonian’s  Hirshhorn Museum and Sculpture Garden  used its 50th anniversary year to dramatically expand its collection, announcing 312 new acquisitions in 2025 that reflect a broader push into photography, mixed-media work, and artists shaping contemporary American visual culture.  The acquisitions range from large-scale mixed-media works by Lorna Simpson and Mickalene Thomas to documentary photography by  Danny Lyon  and Graciela Iturbide, as well as major gifts tied to the museum’s current exhibitions, including works by  Adam Pendleton  and  Mark Bradford .  Related Articles “There has been a deliberate effort over the last few years to deepen certain areas of the Hirshhorn collection, particularly photography, mixed media practices, and the artists who are defining American visual culture including Marilyn Minter , Lorna Simpson and Mickalene Thomas,” museum director Melissa Chiu told ARTnews .…