The Union began accession negotiations with six applicant states in November 1998 and the historic single currency project was launched on 1 January 1999.
Chuaigh an tAontas i mbun idirbheartaiochta i Mí na Samhna 1998 le sé cinn de stáit ata ag iarraidh teacht isteach, agus seoladh tionscnamh stairiúil an airgeadra aonair ar 1 Eanáir 1999.