Of the approximately 10,000 titles in Special Collections, about 5,000 titles comprise the French Collection, a rich assembly of materials spanning the 15th through 19th centuries which includes French coutumes, or customary law, French legal codes, trials, materials documenting the conflict between church and state, and an extensive grouping of French Revolutionary materials. The French Collection was significantly enhanced as a result of two major European auction purchases in 2001 and 2002.