Treaty of Nice
- Ratification information, citizens guides and an archive of the negotiations.
- http://ec.europa.eu/comm/nice_treaty/index_en.htm

Background Briefings - The Treaty of Nice
- Short summary from the European Commission office in the UK.
- http://www.cec.org.uk/info/pubs/bbriefs/bb29.htm

European Constitutional Law Network
- The ECLN is a forum to encourage discussion of the idea of European Constitutionalism by strengthening the communication and the exchange of ideas with academic partners from the Member States of the EU, future EU Member States and the United States of Am
- http://www.ecln.net/

Treaty of Nice, Citizen's Guide
- A guide to the Nice Treaty, covering changes to the institutions and legislative procedures (PDF format).
- http://europa.eu.int/comm/igc2000/dialogue/info/offdoc/guidecitoyen_en.pdf