updated 09/01/2014 AT 1:45 PM ET
•originally published 09/02/2014 AT 12:00 PM ET
Princess Diana’s wedding dress is finally coming home.
The document stipulates that the dress should be given to her sons after Harry turns 30, which he will on Sept. 15.
The silk-and-taffeta lace dress, created by David and Elizabeth Emanuel, features a 25-ft. train and 10,000 pearls. In its day, it was as famous as the Alexander McQueen gown Kate Middleton wore for her 2011 wedding to Prince William.
In 1998, it became the centerpiece of the museum at Althorp, the Spencer family’s estate in Northampton.