In the 1950s the hospital Berlin-Havelhoehe (today the Clinic for Anthropo-sophical Medicine) took over the building that had originally been erected as the National Socialist State Academy for Aviation. It was also there that the pilots who had attacked Guernica in 1934 as part of the Condor Legion had been trained. In 1960, Benjamin Katz fell ill with tuberculosis for a period of one and a half years. He stayed in Havelhoehe and produced an extensive collection of photographs during this time. 48 enlargements together with 380 working prints from the negatives on 30 facsimiled DIN-A4 pages document on the one hand the everyday routine as a patient, but also the architecture and the traces of National Socialism.