ABSTRACT Over the past few decades, Turkey has funded numerous construction and building rehabilitation initiatives in foreign countries. Amidst such efforts, this article scrutinises the implications of Turkey’s heritage diplomacy tied to Ottoman architecture and how it has the potential to overshadow the desires of local populations. It points to one such case in Batumi, Georgia, where a replica of the 1868 Aziziye Mosque was proposed as a part of Georgia-Turkey cross-border heritage exchanges in the 2010s. Here, Turkey’s fostering of the project exacerbated local Muslim Georgian efforts to construct a mosque of their own in the city. The case demonstrates how heritage diplomacy can land poorly, shining light on a range of broader domestic impacts to urban planning and national identity, electoral politics and community social cohesion. Instead of seeing local Muslims as passive bystanders, the article demonstrates how they asserted their rights, building a temporary open-air mosque and redirecting the focus back towards their particular needs. The findings are based on a long-term study of the politics of urban development in Batumi using qualitative methods. They contribute to a growing body of scholarship in critical heritage studies, highlighting connections to public policy, diplomatic relations, and religious activism.