Book excerpt: Forming Catholic Communities assesses the histories of Irish, English and Scots colleges established abroad in the early-modern period for Catholic students. The contributions provide a co-ordinated series of case studies which reflect the most up-to-date research on the colleges. The essays address interactions with European states, international networking, educational frameworks, financial challenges, print culture and institutional survival into the nineteenth and early-twentieth centuries. From these essays, the colleges emerge as unexpectedly complex institutions. With their financial, pastoral, and intellectual networks, they provided an educational infrastructure that, whatever its short-comings, remained crucial to the domestic and international communities they served during more than two centuries.