Domestic Peace. A Dual System Early modern ideas of peace pertained to the domestic sphere as well as interstate relations and societal orders. The notion of peace regarding this smallest social unit evolved in two ways: on the one hand the house itself was legally secured as a place of shelter against any form of hostile trespass; on the other hand the household was safeguarded as an ethically ordered group against harm and violence from other household members. This chapter discusses the different contexts in which the two legal form emerged and how they interacted. The notion of the peace of a built space developed in the Middle Ages. The idea of the family as an ethical concept was fostered by confessional disciplining and by the growing importance of and interest in family and household as nuclei of the emerging state in the early modern period.