European Commission - EU enlargement
Website of the European Commission providing basic information on the EU enlargement process.
Website of DG for Neighbourhood and Enlargement Negotiations of the European Commission providing access to enlargement policy documents, country progress reports and partnerships, information on the technical and financial assistance mechanisms etc. Specific country sections on candidate and potential candidate countries are also accessible.
European Parliament - Factsheet on the Enlargement of the Union
European Parliament factsheet with information on the legal basis, objectives, background, past enlargements and the role of the European Parliament in the enlargement process.
EUR-Lex - Summaries of EU legislation - Enlargement
Summaries of legislation relating to past and ongoing enlargement processes.