This is the 7106th most frequent German word.
friedenau
"Friedenau" is a proper noun and refers to a district in Berlin, Germany; it does not have a separate meaning as a common word.
In this sentence, 'Friedenau' is used as a proper noun referring to a specific geographic location, a district in Berlin.
Friedenau ist ein Stadtteil von Berlin.
Friedenau is a district of Berlin.
Here, 'Friedenau' is mentioned as the location where the described observation took place.
Ich habe in Friedenau viele prachtvolle Altbauten gesehen.
I have seen many magnificent historic buildings in Friedenau.
In this case, 'Friedenau' is used to specify the area where a particular café is located.