The two institutions have recently agreed to share their art holdings on a continuing basis.
Many do not speak about their art holdings, citing privacy and security issues as reasons for their reticence.
Those 11 works sold in June weren't the Bellagio's only art holdings.
His art holdings have been valued at $10 million to $15 million.
Her ancient and medieval art holdings brought the highest total at auction for a sale of antiquities - $8.9 million.
The corporation is selling many of its art holdings in a series of Sotheby's sales over the next two months.
The collection, one of the largest art holdings in private hands, is considered one of the world's most valuable.
It concluded that the estate's art holdings are worth $228 million.
He is best known for more than quadrupling the size of the Whitney Museum's art holdings.
Its art holdings comprise more than 1.6 million works.