Clocking in at just behind the $150 Spelling Manor in Beverly Hills and snagging the title of the second most expensive estate in the world is this private palace in Paris just listed by an affiliate ofChristie's Great Estates for about $140 million. Located on the city's famed Avenue Foch, one of the world's most expensive and prestigious addresses, home to many mansions including those of the Onassis and Rothschild families, the ultra-exclusive estate was built in 1912 for the Duchesse de Montmorency. The nearly 28,000 sq. ft. interior houses 12 bedrooms and 12 baths along with four staff apartments. Many elements of its incredibly rich décor come from older mansions and are of historical importance including 18th century wood paneling, dozens of marble fireplaces and a museum-quality ceiling in the enormous dining room by the great French Post-Impressionist painter Henri Rousseau. The lavish interior also boasts massive crystal chandeliers, huge Corinthian columns, gilded moldings and marble floors.