The Grand Tour of Italy attracted thousands of British travelers throughout the eighteenth century. It was a formative institution of modernity, contributing to a massive reimagining of politics and the arts, of the market for culture, of ideas about leisure, and of practices of professionalism. But this significance has been hard to track among rich but dispersed records, so that for long, scholarship has focused on the best documented, and mostly elite, travelers. This paper will share work from the ongoing Grand Tour Project which has been developing digital tools and an interactive database to widen the scope of study to thousands of diverse Grand Tour travelers. It will illustrate case-studies from the recently published book A World Made by Travel: the Digital Grand Tour as well as new lines of research extending this data work further, while also asking what the stakes are in conducting and disseminating historical research in the digital age, and what are the new possibilities for collective biography in particular.