Like many topics in Paraguayan history, the subjects of popular religion and death are under-researched. And yet, if we can conclude anything about them, experiences involving popular religion and death, like many cultural aspects in Paraguay, have intersected with experiences of nationhood. We find many historical and present-day manifestations of this, most conspicuously in language, which inevitably also draws our attention to questions of syncretic religious legacies. Still today most Paraguayans speak Guaraní, a vernacular of indigenous origin. This language itself is a colonial product of the “spiritual conquest,” whose subsequent role in galvanizing popular participation in two postcolonial wars has long been noted. In fact, perusing national monuments and local cemeteries today draws us to a specific time period when many formative links among syncretic experiences of religion, death, and nationhood were being constructed: the fateful López era (1840–1870) that culminated in the cataclysmic War of the Triple Alliance. Here we find how a modern nation-building project attempted to channel, rather than suppress, popular religious energies, and we encounter the many contradictory, and formative, consequences this project produced. A sampling of scholarly literature and primary sources from within a broader framework of Paraguayan history likewise reveals how links among popular religion, death, and state formation are indeed recurring themes for more research that needs to be done.