World’s Fairs is a collection of digitized primary sources documenting global expositions. Over 200 fairs are included, ranging chronologically from the Crystal Palace exhibition of 1851 to the Milan Expo 2015. Materials include official fair committee records, minutes and correspondence; official catalogues and guide books; exhibit pamphlets; photographs and slides; maps and plans; souvenir artefacts; and audio interviews with attendees. Several major fairs have been designated case studies and have additional explanatory material.