Mary Kay Ash opened the doors to her beauty company on Friday, Sept. 13, 1963.  Why a Friday?  Why on the 13th?  As Mary Kay would say, that’s the day the lease started!  And the number 13 became her lucky number.  So, with 13 floors and 13 passenger elevators, she knew the building along the Dallas North Tollway in Addison, Texas was meant to become home to Mary Kay employees.  In early December 1995, The Mary Kay Building became the company’s global headquarters and has since become a North Texas landmark full of little known facts.