05/16/2011 at 01:00 AM EDT
How's this for a wedding gift? The Queen had the 25-room Sunninghill Park estate (below) built for Prince Andrew when he married Sarah Ferguson in 1986; he sold it in 2007 for $25 million.
Fergie & Andrew
Cars! Jewels! Houses! William and Kate have asked for donations in lieu of presents, but if history is any guide, they stand to rake in some smashing wedding loot
The people of Monaco gave Prince Rainier and Grace Kelly a Rolls-Royce for their 1956 wedding (left); Aristotle Onassis gave them a 147-ft. yacht now valued at around $8 million.
Grace & Rainier
A ROLLS & A YACHT!
Margaret & Lord Snowdon
AN ISLAND RETREAT!
An aristocratic pal gave Princess Margaret a 10-acre parcel of land on the Caribbean island of Mustique during her 1960 honeymoon there.
Elizabeth & Philip
LOTS OF SILVER!
For their 1947 wedding, Elizabeth and Philip put some of their 2,500 gifts on display at St. James's Palace, including hand-knit tea cozies, a Steinway piano, silver platters and a gold-and-jade necklace from the king of Egypt.
A Saudi prince lavished Diana with a five-piece diamond-and-sapphire set to match her engagement ring for her 1981 nuptials; the jewels were then valued at more than $400,000.
Di & Charles