sentences:  For a period in the early nineteenth century the Free City of Cracow had a measure of autonomy outside of the Austrian Empire, the Kingdom of Prussia and Imperial Russia, and was tariff-free.Some international cities, such as the Free City of Danzig and the Free Territory of Trieste, had their own currency and practised tariff-free trade.These international cities had limited self-governance (as in Danzig, with supervision from the League of Nations), or were administered by a body of representatives from external nation-states (as in Shanghai from 1845 to 1944 and the International Zone of Tangier from 1923 to 1957).