The many proposals made by the Conference on the Future of Europe (see EUROPE B12953A1 and B12954A1) include calling an EU-wide referendum, by initiative of the European Parliament (proposal 38.2).
If this idea ever becomes reality, it would be completely without precedent, as there has never been a referendum held internationally before. Furthermore, the operation would stem from a Parliamentary initiative, whereas it is usually the national executive which arranges them – or, in certain...