The Treaty of Lisbon (initially known as the Reform Treaty) is a European agreement that amends the two treaties which form the constitutional basis of the European Union (EU).

Learn more about the history of the treaty of Lisbon and its effect in present days.

Nov 24, 2025 · Lisbon Treaty, international agreement that amended the Maastricht Treaty, Treaties of Rome, and other documents to simplify and streamline the institutions that govern the European …

The Treaty of Lisbon is a significant international agreement that came into effect in 2009, aimed at reforming the structure and functioning of the European Union (EU).

On 13 December 2007, the Heads of State or Government signed the Treaty of Lisbon and called for a swift completion of national ratification processes in the 27 Member States with a view to allowing …

Nov 15, 2024 · On 1 December 2009, the Treaty of Lisbon entered into force. It was signed two years earlier by the leaders of the member states of the European Union. Many of the changes to the EU …

The Treaty of Lisbon (initially known as the Reform Treaty) is a European agreement that amends the two treaties which form the constitutional basis of the European Union (EU).

The Treaty of Lisbon was signed on 13 December 2007 between 27 European states that are members of the European Union (EU). [1] It became effective on December 1, 2009.

Oct 30, 2024 · On 13 December 2007, the EU member states signed the new treaty in Portugal, which became known as the Treaty of Lisbon. The treaty was to be ratified by all member states by 2009.

The Lisbon treaty, which came in force in late 2009, brought new law-making powers to the European Parliament and put it on an equal footing with the Council of Ministers in deciding what the EU does …