Dan Greenberg and his wife, Susan Steinhauser, are one of the 12 most Influential Photography Collectors. Greenberg and Steinhauser have been collecting photographs for over twenty years, largely by twentieth-century American artists as well as Latin American and Japanese photographers, and believe in sharing their collection with the public. This couple of LA Collectors have donate, in march of 2017, more than 500 photographs to the Getty Museum and National Gallery in Washington The Getty’s gift includes 386 works of art by seventeen different photographers and twenty-three additional photographs as future gifts. The National Gallery’s gift includes 143 gelatin silver prints by Dorothea Lange, with ten additional Lange photographs promised. These gifts are part of a broader initiative by Greenberg and Steinhauser that involves donations to a total of thirteen art institutions.