North Carolina Mutual Life Insurance Company - Heritage Museum www.ncmuttuallife.com OnlineWebsite - www.ncmuttuallife.comAddressMutual Plaza, 411 W. Chapel Hill St.Durham, NC 27701PhonePrimary - (919) 682-9201 Nation’s oldest and largest African-American Insurance Company. Twelve stories of steel and glass stand on former site of B.N. Duke’s home, Four Acres. Contains pictorial review of the company. Tours can be arranged.