This is the 1814th most frequent German word.
oberösterreich
"Oberösterreich" means "Upper Austria," a federal state in northern Austria.
Here, 'Oberösterreich' is used as a proper noun to indicate the geographic region of Upper Austria.
Ich habe einen Freund aus Oberösterreich.
I have a friend from Upper Austria.
In this sentence, 'Oberösterreich' is being used as the subject of the sentence, referring to the region itself.
Oberösterreich ist bekannt für seine schönen Landschaften.
Upper Austria is famous for its beautiful landscapes.
'Oberösterreich' here specifies the location where the described characteristics ('Kultur') apply.