o Said to be Europe’s largest the 500 million euro refurbished Paris Convention Centre offers a plenary hall of 5,200 seats linked directly to 44,000 square metres of exhibition space, another 172,000 square metres of exhibition space and up to 50 additional rooms created by partitions. The Centre was formerly part of the Parc des Expositions at the Port de Versailles on the outskirts of the city.

o A new 51,000 square metre conference centre, Caesars Forum, is planned for Las Vegas for 2020.

Costing around $375 million (£271 million) this will incorporate the world’s two largest pillarless ballrooms and 28,000 square metres of flexible space built on an 18 acre site east of the Las Vegas Strip.