The 99-metre luxury Christina O is the sort of vessel that gives yachting a bad name, with its "Jacuzzi" deck, helipad and en-suite marble bathrooms.
When owned by the late Aristotle Onassis, the stools in its bar were covered in whale foreskin, prompting the owner's favourite quip, "Excuse me, madam, did you know you are sitting on the world's largest?"
The same stools are now covered in fine leather, but its most recent owners have endeavoured to retain much of the Greek shipping magnate's taste for splendour.
An open-pool deck where opera diva Maria Callas liked to relax is inlaid with mosaics inspired by ancient Crete, and turns into a dance floor at the push of a button.
Built as a Canadian naval frigate, the convoy escort was purchased by Onassis in 1948 for just $34,000 but he spent over $4 million on its refurbishment.
On board, he played host to the world's movers and shakers, including the Aga Khan, John D Rockefeller, John Paul Getty, Eva Peron, Richard Burton, Elizabeth Taylor and Marilyn Monroe.
Frank Sinatra, Rudolf Nureyev, John Wayne and Greta Garbo are reputed to have signed the log, along with John F Kennedy and Winston Churchill.
Onassis and Jackie Kennedy held their wedding reception on board, as did Princess Rainier of Monaco and Grace Kelly.
Onassis's daughter, Christina, after whom the vessel was named, donated it to the Greek government on her father's death in 1978. It was renamed Argo, but was little used, and fell into disrepair.
It was eventually sold to an American, Alexander Blastos, for $2.2 million, but his cheque reportedly bounced.
In 1998, a Greek shipping businessman, John Paul Papanicolaou, purchased the yacht in a state-sponsored auction, and renamed it Christina O as a tribute to its former famous owner.
Papanicolaou assembled a team of experts to engage in yet another extensive and expensive refit, replacing 560 tons of steel, and installing 56 miles of new wiring and 140 tons of pipes.
The upgrade involved adding new accommodation areas, a gym, a massage room, and a sports lounge fitted with Onassis's original sextant wall lamps and gaming tables.
Ari's Bar was retained, as was an original map that once showed the daily latitude and longitudes of the Onassis shipping fleet.
The yacht is now advertised for charter at up to €65,000 a day for groups of between 25 and 36 people, and that doesn't include food, drink and fuel. The fuel bill is around €575 an hour.
