It is no coincidence that the idea was born in Amsterdam, the capital of the Netherlands, as it is regarded as one of the cities with the largest number of nationalities present: 176 out of a total of 811,000 inhabitants (the metropolitan area on the other hand has a population of 1.6 million inhabitants).
I no és pas fruit de l'atzar que la idea nasqués a Amsterdam. La capital neerlandesa és considerada una ciutat multicultural, amb 176 nacionalitats entre els seus 811.000 habitants (a l'àrea urbana, n'hi viuen 1,6 milions).