In medieval times, Trelleborg had an important part in herring fishing. At that time, this was conducted along the entire coast line of what is now Sweden, as the herring shoals were of such great numbers that fishermen were said to have been able to stand on the shore and land fish with nets. Trelleborg became an important merchant city as merchants from Germany came to trade herring. In 1619 following a devastating fire, the Danish King decided that one merchant city on the coast was sufficient and revoked Trelleborg's status as a merchant city in favour of Malmö.