In the fourtheenth century Kampen had a fleet of over a hunderd ships, bigger than all of the fleets of the Northern Low countries put together. Better ships and navigation instruments led to the exploration of new fields of trade, and the trade shifted onto the Atlantic Ocean. The trade priviliges of the Hanze were withdrawn and the centre of gravity of the Dutch economy shifted towards the West. Nature also had a part in the decade of the flourishing city. The water-supply of the river the IJssel diminished and so the bigger ships had to avoide the habor. Efforts to improve the level were unsuccesful. Because of the cities efforts to keep its meaning as a city of trade, the industry never exceded the local market. Towards the end of the eighteenth century only the monuments were left as prove of the rich past.