Changing patterns of tourism moved the focus away from cultural visits to the big city such as Vienna, Venice, Paris, or London, to new centers dependent for their economic well being on the seasonal arrival of visitors. From the 1930s, resorts catering to a working-class market, such as San Sebastian and Blackpool, joined Nice and other towns on the Côte d'Azur, which had become a source of winter sun and entertainment for the wealthy of northern Europe two generations earlier. Finally, capital cities, which brought together almost all these specialized functions, not only grew in proportion to the expansion of the territorial states of which they were the administrative and political centers, but in many cases came to dominate the urban organization of the entire state. Berlin, which became the German capital only in 1870, exceptionally shared some of this power with other cities which earlier had exercised a dominant regional role.