This is an archive named "The Catalog of Exhibits of the Vienna World Expo Collected by Tianjin Customs". The information of various exhibits selected and sent by Tianjin Customs at the 1873 Vienna World Expo. such as the name, purpose, material are recorded in the catalog. It is the earliest evidence of Tianjin's participation in the World Expo that can be found in the archives. Its author is the Chinese Customs controlled by Robert·Hart.