But on the receiving line , along with the duke and Henry Clay Frick 's great-granddaughter Helen Clay Chace , stood one of the museum 's newest board members , the chief executive of the Blackstone Group , Stephen A. Schwarzman .
Blackstone Group
Stephen A. Schwarzman
/business/company/founders
Stephen A. Schwarzman
Blackstone Group
/business/person/company
PERSON
Henry Clay Frick
ORGANIZATION
Blackstone Group
PERSON
Stephen A. Schwarzman