Europa Portal - The History of the European Union
- A brief history, plus key events of each year from 1946 onwards.
- http://europa.eu/abc/history/index_en.htm

History of European Integration and Citizenship
- Short guides to events in EU integration and the developments of the concept of EU citizenship.
- http://www.historiasiglo20.org/europe/index.htm

European NAvigator (ENA) : Plotting the course of a united Europe
- Provides a variety of multimedia documents about the history and institutions of a united Europe: includes photos, facsimiles, cartoons, sound and film clips, interviews, interactive maps and diagrams. (Requires Flash)
- http://www.ena.lu/

Wikipedia - History of the European Union
- Online encyclopedia article.
- http://en.wikipedia.org/wiki/History_of_the_European_Union

European Parliament UK Office - History of the EU
- Short overview, with links to other resources, plus a guide to the division of institutions between the three cities of Brussels, Luxembourg and Strasbourg.
- http://www.europarl.org.uk/EU/EUhistoryprincip.htm

BBC News - Milestones of Europe
- Archive of important events in the history of the EU, including audio and video footage.
- http://news.bbc.co.uk/hi/english/static/in_depth/europe/2001/inside_europe/milestones/

Leiden University - History of European Integration
- Directory of thematic links to documents and research papers.
- http://www.eu-history.leidenuniv.nl/

The European Prospect
- Essential selections from documents and testimonies on the history, culture and future of the European Union.
- http://www.epopteia.net/notebook/europeanunion.htm