Martha von Bulow was a personification of romantic notions about high society - a stunning heiress who brought her American millions to marriages to men who gave her honored old European names.
But she ended her days in a coma in a nursing home on Manhattan's East Side, giving no sign of awareness as she was visited by her children and tended around the clock by nurses.
In the 1980s, she was the offstage presence that haunted her husband's two sensational trials in Newport and Providence, R.I.
At the first trial, in 1982, Claus von Bulow was convicted of trying twice to kill her by injecting her with insulin at their estate in Newport, R.I. That verdict was thrown out on appeal and he was acquitted at a second trial in 1985.
The murder case split Newport society, produced lurid headlines and was later made into a film, "Reversal of Fortune," starring Glenn Close and Jeremy Irons.
Claus von Bulow is living in London, "mostly taking care of his grandchildren," said Alan Dershowitz, the defense lawyer who won his acquittal at the second trial.
"I'm sure Claus is very sad today," he said. The lawyer called Sunny von Bulow's death "a sad ending to a sad tragedy that some people tried to turn into a crime. It was never a crime."
"There are no winners in a case like this. I'm happy to have played a role in getting the criminal conviction reversed, because it was an unjust conviction, but there were no victory parties or celebrations afterwards because there was a woman in a coma," Dershowitz said.
Claus von Bulow's main accusers were his wife's children by a previous marriage to Austrian Prince Alfred von Auersperg. They renewed the charges against their stepfather in a civil lawsuit a month after his acquittal.
Two years later, Claus von Bulow agreed to give up any claims to his wife's estimated $25 million-to-$40 million fortune and to the $120,000-a-year income of a trust she set up for him. He also agreed to divorce her, leave the country and never profit from their story.
The scene of the couple's lavish social life and its demise - her oceanfront estate in Newport - was later sold for $4.2 million. Also sold was a 12-room apartment on Manhattan's Fifth Avenue, for $6.25 million. The art and antiques from the homes fetched $11.5 million at a spirited two-day auction.
Prosecutors contended that Claus von Bulow wanted to get rid of his wife to inherit a large hunk of her wealth and be free to marry a mistress. The defense countered by picturing Martha von Bulow, who suffered from low blood sugar, as an alcoholic and pill popper who drank herself into a coma.
Witnesses at the trials included author Truman Capote and Joanne Carson, wife of Johnny Carson.
Claus Von Bulow was accused of injecting his wife with insulin first in December of 1979, causing a coma from which she revived. Prosecutors said he tried again a year later, on Dec. 21, 1980, and the 49-year-old heiress fell into an irreversible coma.
Her world was reduced to private, guarded rooms at Columbia-Presbyterian Medical Center. She died at the Mary Manning Walsh Nursing Home, her family said.
Her doctor testified that the cost of maintaining her was $375,000 the first year, 1981.
No figures were available for the years that followed, but by the early 1990s room charges were up to about $1,500 a day - $547,000 a year - plus $200,000 to $300,000 for round-the-clock private nursing.
The daughter of utilities tycoon George Crawford, Sunny von Bulow was born Martha Sharp Crawford aboard a railcar in Manassas, Virginia, on Sept. 1, 1932, her family said. Her father died when she was 4.
Nicknamed "Sunny" for her disposition, von Bulow grew up in Pittsburgh and New York City, raised by her mother. She attended Chapin School and St. Timothy's in Maryland, skipped college and came out as a debutante in 1951.
While touring Europe with her mother, she met Prince Alfred von Auersperg, who was younger, penniless and working as a tennis pro in an Austrian resort catering to rich Americans.
They were married in 1957 and divorced eight years later after she returned alone to New York with their young son and daughter. On June 6, 1966, she married von Bulow, who then quit his job as an aide of oilman J. Paul Getty.
Claus von Bulow was in London as recently as Nov. 25, where he attended the annual award of the "Bad Sex in Fiction" prize, according to an article posted on the Web site of The Daily Telegraph. Attemps to reach him Saturday were not immediately successful.
Martha von Bulow is survived by her children, Ala Isham, Alexander von Auersperg and Cosima Pavoncelli, the only child of Claus and Sunny.
"We were blessed to have an extraordinarily loving and caring mother," the children said in a written statement. "She was especially devoted to her many friends and family members." A private memorial service is planned, they said.
Associated Press Writers Jay Lindsay in Boston and Raphael G. Satter in London contributed to this report.