Biltmore (a name derived in part from Bildt, the Vanderbilts' Dutch town of origin) has been receivingguests since its completion, and paying ones since 1930.
Pope Francis will continue to use the papal library on the second floor of the Apostolic palace for receiving official guests and will appear on Sundays at the window used by previous popes to address pilgrims in St Peters Square.
Now, instead of receiving thick-carded invitations to runway shows in the mail, guests are invited via email and directed to bring a barcode printout of their seat confirmation to the show in order to be admitted.