A little over two years ago, high-profile investor Carl Icahn tested the upper-tier New York City residential real estate waters by relisting his combination penthouse in Museum Tower for $35 million. In the late winter of last year, a relist at $30 million represented a second crack at selling the 14,000 sq. ft., seven-bedroom skyline villa.

This month, Icahn — who, along with many other financial-sector household names, has relocated from Manhattan to the Palm Beach area of Florida — changed tack by listing one of the penthouse units that make up the residence with an asking price of $10 million. The duplex unit’s interior floor space measures 5,000 sq. ft.; its terraces add another 800 sq. ft. to the residence’s total.

The heart of the property is the great room. It measures fifty-two feet in length, offers stunning city and park views, and is finished with herringbone-pattern oak and floor-to-ceiling hardwood paneling. It opens to a kitchen with a blue tile floor and eight-burner commercial-grade stainless range, which offers further access to the home’s dining room; the latter boasts a full-sized wet bar.

In its current configuration, the unit’s accommodations include a primary suite, a guest room and a staff room. Specialty rooms include a library.

Icahn’s net worth is north of $15 billion.