The art of integration: 40 posters promoting Europe is an anniversary volume published in celebration of the 40th anniversary of the Historical Archives of the European Union (HAEU). The book presents 40 posters related to European integration, selected from the Nicola Di Gioia poster collection deposited at the Historical Archives of the European Union, and discusses 8 important themes in the history of European integration: Origins, Identity, Democracy, Rights, Economy, Diplomacy, Research, and Future. The Nicola Di Gioia collection is one of the most significant collections of EU posters available due to its quality, historical significance, and quantity. For more information about the Nicola Di Gioia collection, and other archival sources held at the HAEU, consult www.eui.eu/haeu.