The introduction outlines the geographies of slavery and black freedom in eighteenth-century Colombia, the significance of region and race in Colombian history, and the importance of the mobilities of black people, their labour, and their culture in traversing and connecting New Granada’s Caribbean and Pacific worlds. Fisk argues for the centrality of geography, in particular place and mobilities, for shaping black religious knowledge and practice in a period (1690–1790) rarely studied by historians of African diasporic cultural history. After a historiographical and theoretical examination of how African diasporic religious formation has been studied, Fisk explores the variety of regimes of slavery and sites in which people of African descent resided in colonial Colombia – from cities, haciendas, and mines to maroon communities. She argues that place fundamentally shaped how people of African descent engaged with Catholicism. She conceptualises black Catholic practice in eighteenth-century New Granada as an “interstitial religion,” born of the physical and metaphorical interstices in a colonial society governed through slavery and introduces a methodology of religious geographies for the study of black religious knowledge where there is no written canon.