In a city with no shortage of grand accommodation, prepare to be swept off your feet. Built for the sugar baron Duc de Morny (Napoléon III’s half-brother and quite the dandy in his own right) and once own by Mr Pierre Cardin, today this mansion proves to be a draw for the cool crowd of Marais. Of the original interiors, only the fireplaces remain, but you’ll forgive the complete refit when you slap your eyes on the candlelit spa with 16m swimming pool. The intimate bar is also worth ducking into. Stay in the suite named in honour of the building’s original occupant – it boasts a formidable view of the Grand Palais.