The ubiquity of office is rivaled only by its scholarly neglect. The stable realities and the debates and ethics attached to institutions of office are poorly reflected in political science and public administration. Offices serve as ministerial trusts (directed toward service, not to be owned, inherited or seized), they are structured by accountability institutions and ethics, and they are ineluctably relational – they exist in correspondence to other offices, those governed (who make claims upon offices), and notions of just and right. Examining public administrative offices from republican Rome through the medieval Catholic episcopacy to early modern England, I argue that institutions and ethics of office took shape that indelibly shaped American and Western public administration as we know it today. Fertile research agendas include the existence and evolution of public offices, the mechanics of their constraints upon behavior, oaths and commitment, their simultaneous embedment of obligation and authority, and rewards (fee, emolument, rent, benefice, salary).