This museum, located at Andrássy út 60 in Budapest, was used by both the Arrow Cross Militia (i.e. the Hungarian fascists during WWII) and the ÁVH (the secret police from the Communist era.) Specially-constructed (and diabolical) torture cells in the basement probably made it convenient to keep from one regime to the next.
The photo above and the photo below were taken at almost the same time (around dusk), but with some adjustments to the manual settings. (You can see the time continuity in the clouds above the hotel in the right half of the photo.) What a difference a few clicks make.