Treaty establishing a Constitution for Europe

The Treaty establishing a Constitution for Europe (TCE; commonly referred to as the European Constitution or as the Constitutional Treaty) was an unapproved international treaty meant to create a constitution for the European Union (EU). 
It would have replaced the European Union treaties with a single text.
The Treaty was signed on 29 October 2004 by representatives of the then 25 member states of the European Union. It was later ratified by 18 member states.
However French and Dutch voters did not approve the treaty thus not passing it.