Following recent research in Lagos and Kinshasa, this paper critically analyses examples of urban infrastructure financed and provided by Pentecostal organisations. These include electricity and water supply, bridges, as well as new homes, schools, universities and hospitals. The questions posed by this paper are: what is distinctive about this mode of urbanisation? How should we understand the ontology of religious urban infrastructure? And, what distinct kinds of urban social relations do these ‘infrastructural experiments’ result in? On a fundamental level, infrastructural projects delivered by religious actors challenge the assumption in urban studies that urbanisation has become a secular process, driven solely by relations between market and state. As such we consider the degree to which urban theory adequately makes sense of infrastructure that is understood by its providers and users to exist by ‘faith of God’. Evocations of ‘lively’ infrastructures, the ‘poetics’ of infrastructure and ‘enchanted’ materialities go some way towards understanding these developments, but critical questions concerning responsibility for planning and infrastructural delivery, inclusivity and the imaginaries tied to these new infrastructures remain. This paper address these issues and more broadly, the novel ‘relation between things’ associated with a Pentecostal ‘alter-city’ that exists within but also as an extension of/ in opposition to the mega-city.