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).
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).