The state creates property, and (consistent with due process of law) the state takes it away. This article will focus upon a type of property destruction-foreclosure-that is integrally related to creditor priorities both in and out of bankruptcy. Foreclosure theory is understudied and underdeveloped. It is neglected particularly when unusual forms of property are involved, many types of which have only recently been invented. This article will concern itself specifically with the foreclosure of what I will call servitudes-personal obligations that are imposed upon the owners of encumbered items simply by virtue of their being in possession of these items.' Servitudes are not mortgages or liens. The encumbered items are not necessarily collateral for debts of their owners. Rather, servitudes are strictly personal obligations that may be enforced as such against servitude-debtors only by the usual means of injunction or execution of money judgments. The servient property merely signals whom the plaintiff may sue to enforce a contractual or tort duty. This article will discuss three kinds of servitudes. First, it will consider the contractually created servitude on land. Second, it will consider the recently created products-liability servitude that may impose on owners of factories