Antoine Harari

Cache of leaked documents reveal Sotheby's owner Patrick Drahi’s $750m art collection—and his tax affairs

Billionaire businessman has amassed a treasure trove of more than 200 prime works of art, many bought through his auction house

Sanctions on Russian oligarchs put focus on assets and art stowed away in Swiss freeports

Legal loopholes of secretive customs complexes are in the spotlight again as pressure ramps up on Russian owned assets