In the second half of the 1980s the idea of an economic and monetary union was revived in the Single European Act of 1986, which created a single market.
Sa dara leath de na 1980idí tharla athbheochan ar an smaoineamh maidir le haontas eacnamaíoch agus airgeadaíochta san Ionstraim Eorpach Aonair i 1986 a chruthaigh margadh aonair.