Christina O - 99 meters - 325 ft
Formerly - Stormont
Owned - John Paul Papanicolaou (as a business)
Launched - 1943
Interior Design - Apostolos Molidris
Refit - 1988
The Christina O website
Christina would be the yacht that I would charter! Aristotle Onassis' owned the legendary mega yacht "Christina O" which he had named after his daughter Christina.
Since the summer of 2001 the yacht totally refurbished and is under new ownership by John Paul Papanicolau. She is available for private chartering. Aristotle Onassis spent just $4 million in the early 1950's to convert the Canadian naval frigate Stormont, a convoy escort into Christina..
Her guest book reads like the who's who of world famous people, guests have included Maria Callas, Eva Peron, John Paul Getty, Sir Winston Churchill, Prine Rainier, Princess Grace, Elizabeth Taylor, Marilyn Monroe, Jackie Kennedy to name just a very few.

Carinthia VII - 98 meters - 321 ft
Launch - 2002
Builder - Lürssen
Design - Tim Heywood
Owner - Heidi Horten
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Just goes to show you that women should have more of a hand in design / commissioning of yachts. Elegant and sleek this yacht was ordered by Heidi Horten, a German retail heiress. Another member of the very very private rich not many know what the interior of this yacht looks like.
Carinthia V sank on launch. Ooops.

Limitless - 96 meters - 315'7" ft
Year - 1997
Builder -Lürssen
Design - Jon Bannenberg
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Indian Empress - 95 meters - 311'7" ft
Formerly: Al Mirqab
Year - 2000
Builder - Oceanco
Photo | Photo

Eos - 93 meters - 305 ft
Year - 2006
Builder - Lürssen
Stylist: Bill Langan
Interior: François Catroux
Photo | Photo | Photo

The Eos is a three masted Bermuda rigged schooner sailing luxury yacht, currently owned by Barry Diller. It is one of the largest - if not the largest private sailing yacht in the world, its overall length measuring approximately 305 feet (93 m). It was launched in Germany from the Lürssen yard in 2006 after being designed by Bill Langan, with Rondal/Huisman supplying the rig, and the naval architecture being completed by the Lürssen team. The interior was designed by François Catroux.

Attessa IV - 92 meters - 302 ft
Year - 1997
Builder - Hayashikane, Japan

Originally called Evergreen Attessa stretches 92.14 meters from bow to stern with a displacement of 2,621 tons. Beneath her exquisitely beautiful finish Evergreen's hull is steel, and her higher decks are aluminium.

She displays a sleek, elegant profile in the water, distinguished by a rounded bow, broad beam aft, and upper decks towards the centre. Evergreen's interior appointments can only be described as impeccable, from the majestic grand saloon to the large recreation facility with its large karaoke bar and full dance floor, to the magnificent master stateroom, 14 luxury guest cabins, and spacious crew quarters. The comprehensive appointments of crew quarters alone far outstrip those of other yachts.

Tatoosh - 92 meters - 301'8" ft
Year - 2000
Builder - Nobiskrug
Owner - Paul Allen
Photo | Photo and more info | Photo

Mayan Queen IV - 92 meters - 301'8" ft
Year - 2008
Builder - Blohm + Voss
Owner - Alberto Bailleres

Heavy security prevent much of the vessels details being made public.

http://www.superyachttimes.com/editorial/2/article/id/2415

http://images.vesseltracker.com/images/vessels/midres/Mayan-Queen-Iv-187171.jpg

Nahlin - 91 meters - 300' ft
Year - 1930/2003
Owner - Nick Edmiston
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Nero - 90 meters - 300' ft
Year - 2007
Builder - Corsair yachts
Owner - Nick Edmiston

Dubawi - 90.6 meters - 297'2" ft
Year - 1989
Builder - Cantiere Navale Ferrari
Refitted passenger ship. If you take the elevator to the top, you’ll arrive on the owner’s private deck, complete with stateroom, office, and a forward-facing tanning deck. Deck Four contains 12 guest cabins and the wheelhouse, while Deck Five holds six VIP suites and a barbeque area. And the first deck? It holds the accommodations for at least 69 crew.

Ice - 90 meters - 299'6" ft
Formerly - Project Rainbow - Air
Year - 2005
Launch - 2005
Builder - Lürssen
Photo | Photo | PDF Brochure

Athena - 90 meters - 295 ft
Year - 2004
Builder - Royal Huisman
Photo | Photo | Photo and more info

Constellation- 88 meters - 290 ft
Year - 2002
Builder - Cassens Werft
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Asean Lady - 88 meters - 289 ft
Year -2003 Brian Chang
Builder - Yantai Raffles
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Arctic P - 88 meters - 289 ft
Year - 1966
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Ecstasea - 88 meters - 289 ft
Year - 2004
Builder - Feadship - Royal Van Lent
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Maltese Falcon - 87 meters - 285 ft
Year - 2005/6
Builder - Perini Navi
Owner - Tom Perkins
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Kingdom 5KR - 85 meters - 281 ft
Formerly: Nabila • Trump Princess
Year - 1980
Shipyard - Benetti
Owner - Prince Alwaleed bin Talal (formerly owned by Donald Trump and Adnan Khashoggi)
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Alysia - 85 meters - 280 feet
Year - 2005
Builder - Neorion
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Delma - 85 meters - 279 ft
Formerly - Annaliesse
Year - 2004
Builder - Neorion
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Alfa Nero - 82 meters - 269 ft
Year - 2007
Builder - Oceanco
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O'Mega - 82 meters - 270'7" ft
Year - 1985 Charter yacht
Built in Japan by Mitsubishi and completed in an Italian shipyard.
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Ocean Breeze - 82 meters - 269 ft
Year - 1981
Formerly owned by King Abdullah bin Abdul Aziz Al Saud and Saddam Hussein
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Golden Odyssey - 80 meters - 265'7" ft
Year - 1990
Builder - Blohm & Voss
Owner - Prince Khalid bin Sultan
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Bart Roberts - 80 meters - 265' ft
Year - 1963
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Named after a pirate Because the vessel was previously an icebreaker under the command of the Canadian Coast Guard.