The main entrance to the AAKH Campus (or former General Hospital Campus) has remained much the same for hundreds of years. For a long time a doorman on the left of the entrance made sure that people only entered the site during hospital visiting hours. Otherwise it was closed to the public.
Main entrance to the General Hospital, 4 Alser Straße, 1930s
Source: Picture collection, Collections and History of Medicine, MedUni Wien