What do the former Paris mansion of fashion house Emanuel Ungaro and Bernard Arnault's Luxembourg and Belgian holding companies have in common? They are all managed by a small but loyal team of Luxembourg accountants who have been working for the LVMH chief Arnault for over a decade.

The mansion in the Invalides district of Paris was bought for €55m in May 2019 and is currently being renovated. Officially, it is owned by a company called Doria. That firm is registered in Luxembourg, was also created