This is the 3308th most frequent German word.
gera
"Gera" is the name of a city in Thuringia, Germany.
In this sentence, "Gera" is used as a proper noun, denoting the name of a city in Germany.
Wir fahren morgen nach Gera.
We are traveling to Gera tomorrow.
Here, "Gera" again refers to the city, but it is used as the subject of a descriptive statement.
Die Geschichte von Gera ist sehr interessant.
The history of Gera is very interesting.
In this sentence, "Gera" is the object of the preposition "über," signifying the topic discussed in the book.