This article provides an overview of the historiography of medical education and calls for greater attention to the connections between medical schools. It begins by reviewing research on medical education in imperial metropoles. Researchers have compared medical schools in different national contexts, traced travellers between them or examined the hierarchies that medical education created within the medical profession. The article then shows how historians have emphasised the ways in which medicine in colonial empires was shaped by negotiation, exchange, hybridisation and competition. The final part of the article introduces the special issue 'Medical Education in Empires'. Drawing on a variety of sources in English, French, Dutch and Chinese, the special issue builds on these historiographies by juxtaposing cases of medical schools in imperial contexts since the eighteenth century. It considers who funded these medical schools and why, what models of medicine underpinned their creation, what social changes they contributed to, what life was like in these schools, who the students and teachers were and what graduates did with their medical careers. This special issue thus contributes to clarifying the role of medical education in empires and the long-term impact of empires on the medical world.