The Roman Catholic Church suffered persecution in Nazi Germany. The Nazis claimed jurisdiction over all collective and social activity. Clergy were watched closely, and frequently denounced, arrested and sent to Nazi concentration camps. Welfare institutions were interfered with or transferred to state control. Catholic schools, press, trade unions, political parties and youth leagues were eradicated. Anti-Catholic propaganda and "morality" trials were staged. Monasteries and convents were targeted for expropriation. Prominent Catholic lay leaders were murdered, and thousands of Catholic activists were arrested.