MOSCOW, RUSSIA - OCTOBER 6, 2016: Prince Albert II of Monaco and Russia's President Vladimir Putin (L-R front) attend the opening of Moscow's State Tretyakov Gallery exhibition titled "Romanovs and Grimaldi. Three Centuries of History (XVII-XIX)" and featuring old documents, paintings and furnishing from the archives of both royal dynasties. Alexei Nikolsky/Russian Presidential Press and Information Office/TASS (Photo by Alexei Nikolsky\TASS via Getty Images)