This is the 5989th most frequent Catalan word.
jerusalem
Jerusalem.
Here, 'Jerusalem' is used as a proper noun referring to the historical and religious city.
Jerusalem és una ciutat molt important per a diverses religions.
Jerusalem is a very important city for various religions.
In this sentence, 'Jerusalem' is again a proper noun denoting the city, used as an object of the verb 'travel'.
El meu amic va viatjar a Jerusalem el mes passat.
My friend traveled to Jerusalem last month.
'Jerusalem' here signifies the subject of historical discussion in the book.