This is the 3880th most frequent Russian word.
берлине
"Берлине" is the prepositional case of "Берлин," meaning "in Berlin" (the capital of Germany).
Here, 'Берлине' is the prepositional case of 'Берлин', used after the preposition 'в' to denote location.
Я был в Берлине прошлым летом.
I was in Berlin last summer.
In this context, 'Берлине' again appears in the prepositional case, describing where something exists.
В Берлине много музеев и парков.
There are many museums and parks in Berlin.
The word 'Берлине' is in the prepositional case, signifying the place where the action occurred.