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Institutional affairs

Find out about the EU's and the Council's institutional set-up and rules

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Internal reforms of the EU

Better regulation

A montage showing a map of Europe with present EU member states highlighted, the EU flag, an open treaty book with signatures, and a handshake, all surrounded by yellow stars on a blue background.

How EU treaties shaped the Council of the EU and the European Council

Last review: 15 April 2026