This document is an excerpt from the EUR-Lex website
The EU Treaties are binding agreements between EU Member States. They set out EU objectives, rules for EU institutions, how decisions are made and the relationship between the EU and its Member States. Every action taken by the EU is founded on treaties.
Treaties are amended to make the EU more efficient and transparent, prepare for new Member States and introduce new areas of cooperation.
EUR-Lex contains the Founding, Amending and Accession Treaties, along with some protocols.