Since you won’t find Hitler plaques and signs in Vienna here is your covert guide to learning about the Nazi Fuhrer when in Wien.
“In 1908, Adolf Hitler shared a small room in a flat in Stumpergasse 31 in Mariahilf (sixth district) with his childhood friend August Kubizek. After Hitler had used up his family inheritance he was forced to leave the flat and became temporarily homeless. Every now and then he would use the homeless shelter in the 12th district of Meidling before renting an inexpensive room in a large B&B for males (Männerheim).
While you can’t access the flat it’s worth visiting the area to get an idea of the place Hitler once called home. On a pragmatic note, combine it with a visit to the Imperial Furniture Collection (aka Hapsburgs Museum of Furniture), at 20-25 min walking distance.” Source: Hitler in Vienna: Uncovering The Führer And Nazi Vienna