Sat, 09/23/2023 - 10:20 Tech Insider Roman Abramovich and Dasha Zhukova in Moscow in 2017.Team Boyko/Getty Images Tags finance, weekend-bi-uk-news, roman-abramovich, art, Billionaire, art-collection, russian-oligarchs Source Roman Abramovich and ex-wife Dasha Zhukova amassed a 'stupendous' art collectio…