This is the 6060th most frequent French word.
düsseldorf
"Düsseldorf" is not a French word; it is the name of a city in Germany.
In this sentence, 'Düsseldorf' is used as a proper noun to refer to a city name.
Je suis allé à Düsseldorf en Allemagne pour mes vacances.
I went to Düsseldorf in Germany for my vacation.
Here, 'Düsseldorf' is used to indicate the location associated with the mentioned fashion context.
La mode à Düsseldorf est réputée internationale.
Fashion in Düsseldorf is internationally renowned.
In this usage, 'Düsseldorf' directly refers to the city's role as the host of an event, emphasizing its identity.