The Lotz family have over 400 photographs plus some contact sheets and negatives. Most pre-war prints are on Agfa Brovira paper and were printed by Hilde. She also used Agfa Lupex in the early war years. In 1977 she commisioned Nannini (Roma) to make prints from her 1930's negatives.
7,000 35mm negatives from 1935-1943 taken with an early Leica. For a superb selection, it is well worth visiting his website.
488 photographs of Florentine urban subjects, sculpture, in the form of glass plate negatives and prints
See Evidence of a special gaze: an appreciation by Dr Ute Dercks, deputy director of the Photo Library at the Kunsthistorischen Institut in Florenz (KHI)
The Hertziana has a selection of prints plus glass negatives held in the Lotz archive.
Large format prints made for the 2008 exhibition.