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The AveTransRisk database was recently published by the ERC project “Average-Transaction Costs and Risk Management during the First Globalization (Sixteenth-Eighteenth Century)”. It captures data on early modern maritime trade thanks to the use of an understudied source: General Average procedures. The database contains information on thousands of cases, aiming to become the repository for such records. The article discusses the particularities of the data from Genoa and Livorno and the solutions put in place to capture it, outlining the choices that confronted the database creators during the four-year period of construction. It then outlines the technical solutions implemented and show the database’s potential for historical analysis thanks to its built-in computational tools.