NEW YORK -- An auction of the contents of philanthropist Brooke Astor's two homes brought in over $18.8 million, Sotheby's said Tuesday.

Sotheby's offered 901 objects in all, including European and Asian furnishings, Old Masters, Qing Dynasty paintings, tea sets, silverware, jewelry, a porcelain menagerie, more than 100 dog paintings and even the uniforms of her domestic staff at a two-day auction that began Monday.

Proceeds will go to institutions and charities, including the New York Public Library and the Metropolitan Museum of Art, under a settlement negotiated by the state attorney general's office.

The collection had expected to fetch just $6 million to $9 million.

The sale concluded Tuesday evening with a selection of jewelry from Astor's personal collection. Among the highlights was Astor's emerald engagement ring, which sold for more than $1.2 million.

The auction comes after a nasty family feud involving her only son, Anthony Marshall. The five-year dispute ended in March with a settlement that freed $100 million for her charities and cut by more than half the amount going to Marshall, who was convicted of taking advantage of his mother's dementia, partly by engineering changes to her will. He has appealed.

The dispute had threatened to deplete the entire estate.

Astor spent her life putting the fortune that her third husband, Vincent Astor, left to use where it would do the most to alleviate human misery. Her efforts won her a Presidential Medal of Freedom, the nation's highest civilian honor, in 1998.

Astor died in 2007 at age 105.

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  • Brooke Astor

    FILE - In this May 1, 1997 file photo, Brooke Astor attends a function in New York. The immaculately dressed grande dame of New York City - philanthropist, taste-setter and host extraordinaire - died in 2007 at the age of 105. Sotheby's New York will conduct a two-day auction on Sept. 24-25, 2012 of some 900 personal items from Astor's Park Avenue duplex and her stone manor in Westchester. (AP Photo/Serge J.F. Levy, File)

  • This undated photo provided by Sotheby's shows a group of five seated porcelain dogs that belonged to the late philanthropist Brooke Astor. Sotheby's said the lot will be offered for sale Sept. 24-25, 2012 with some 900 of Astor's personal items from her Park Avenue duplex and her stone manor in Westchester. (AP Photo/Sotheby's)

  • FILE - This undated file photo provided by Sotheby's shows a gold, a colored diamond, coral and ruby lion brooch that belonged to the late philanthropist Brooke Astor. The piece will be sold at an auction in New York of the late philanthropist's personal items which will include some 900 items to be offered Sept. 24-25 from Astor's Park Avenue duplex and her stone manor in Westchester. (AP Photo/Sotheby's, File)

  • This undated photo provided by Sotheby's shows an emerald and diamond ring and necklace that belonged to the late philanthropist Brooke Astor. Sotheby's said the set will be offered at a New York auction of the late philanthropist's personal items which will include some 800 items to be offered Sept. 24-25 from Astor's Park Avenue duplex and her stone manor in Westchester. (AP Photo/Sotheby's)

  • This undated photo provided by Sotheby's shows a painting of a dog by Otto Eerelman titled "Sitting Up," that belonged to the late philanthropist Brooke Astor. Sotheby's said the piece will be offered at a Sept. 24-25, New York auction of some 900 personal items from Astor's Park Avenue duplex and her stone manor in Westchester. (AP Photo/Sotheby's)

  • FILE - This undated file photo provided by Sotheby's shows the staircase at Brooke Astor's Westchester estate, Holly Hill, in Briarcliff Manor, New York. On Sept. 24-25, 2012, Sotheby's New York will auction some 800 of the late philanthropist's personal items from her Park Avenue duplex and the stone manor in Westchester. (AP Photo/Sotheby's, File)