The Cusco Declaration, formally titled Preamble to the Foundation Act of the South American Union, is a two-page declaration of intent signed by 12 South American countries during the Third South American Summit on 8 December 2004 in Cusco, Peru. It announces the foundation of the Union of South American Nations.^[1] It called for a regional parliament, a common market and a common currency.

• Constitutive Treaty

• Text of the declaration (In English)
• Text of the declaration (In Spanish)