Is art crime really the third-largest illicit trade, after narcotics and weapons? Why do estimates of its value range so dramatically? Despite several decades’ worth of scholarship on the topic, reliable quantitative knowledge about art crime is difficult to obtain. Part of the explanation is that “art crime” itself is an unstable term, subject to vastly different definitions. Relevant, too, is the diffuse nature of the body of work on art crime. In Quantifying Art Crime, we are amalgamating, analyzing, and synthesizing ten years’ worth of quantitative studies of art crime. In light of the complexity of this area of research, the project looks at the issue from multiple angles including monetary value, volume of material moving through the market, network connections, regional scales, and spatial social relationships between the market and trafficking networks. We are proud to partner with the University of Virginia School of Data Science Capstone program, and acknowledge our Network Mobility of Illicit Cultural Property (NMICP) team.