The palace is a subtle example of the maharajas' artists banished by Emperor Aurangzeb  worked on the columns and arches, and on the building's gallery around the Diwan-i-Am (Hall of Public Audience).
Emperor Aurangzeb banished many maharajahs artists, who later worked on the palace's columns.
It is therefore unlikely that Donna Karan (or any other celebrity) would have been quoted.