 The Prussians introduced religious toleration, leading to the construction of the Protestant parish church "Zum Garten Christ" from 1746 to 1747; Catholic Poles were later discriminated against, however.In 1758, during the Seven Years' War, POWs brought the plague epidemic to the city.The city's textile industry was booming by the end of the 18th century, and by 1800 large parts of the city walls had been dismantled to allow the city to expand.