Through the window of Dr. Wiegand' office the "SAS Plaza Hotel Hamburg" is visible. However the building didn't receive this name since November 1988 when it was purchased by the SAS Group. AT the time of the scene's setting (1979/1980) the building was called "CP Hotels Hamburg Plaza".
When Freya von Hepp hands Hermann Willié Göring's bathrobe and offers him to try it on, Willié's answer doesn't match his almost motionless lips.
The invitation card of Karl Lentz and his announcement about 90th birthday of Adolf Hitler sets the scene in the year 1979. However earlier in the film when one of the editors in chief, Kurt Glück, is examining Hermann Göring's bathrobe he mentions that he is dead for over 40 years. Göring died in 1946 which would mean he is at least dead for over 30 years.
Dr. Wieland mentioned that he is shortsighted and therefore Kummer is holding it further away in order to show him. However if he would be shortsighted, it should be held closer to him, not farther away.