This superyacht Amadeus is owned by French industrialist and art collector, Bernard Arnault. Bernard Arnault is France's richest person and not long ago said he would take Belgian citizenship to avoid the very high French taxes but there was such an outcry he changed his mind! He's the chairman and CEO of the French conglomerate LVMH, the largest luxury-products company in the world - Louis Vuitton and so on.
Amadeus was built in 1969 as a research vessel and was converted to a superyacht in 2007. She has an icebreaker hull.