Wowzers -- I've been waiting for Silvia to bust out this major tiara! This is the Bragança Diamond Tiara, sometimes also called the Brazilian Tiara.
Rather than reinvent the wheel, I'll let the Swedish royal court's info about this tiara tell the story: "The Queen will be wearing the Brazilian Tiara at The Crown Princess Couple's wedding. This tiara is chiefly a French 18th century piece that was modernised around 1820 to give it its current form. It is called the Brazilian Tiara because it belonged to the Brazilian Empress Amelie. Empress Amelie was the younger sister of our Swedish Queen Josefina. This magnificent tiara was one of the items that were inherited by Queen Josefina on the death of the Empress in 1873."
The emperor of Brazil, Amelie's husband, also vied for the title of Duke of Bragança, which belongs to the heir to the Portuguese throne -- hence the tiara's other commonly used name. Amelie and Josefina (also called Joséphine) were both daughters of the Duke of Leuchtenberg, and many of the tiaras owned by the Swedes and the Norwegians today are Leuchtenberg pieces. (The Duke of Leuchtenberg was the son of Empress Joséphine of France, Napoleon's first wife -- hence the legacy jewels from her.)
Phew! The Bragança is quite a piece -- almost edging on needing to be on display in a museum rather than on a head, much like the Luxembourg Empire Tiara. But Sil does have a knack for wearing these big pieces, doesn't she?
Want to see a full-length shot of the tiara and dress? Click below...
Queen Silvia and Prince Daniel's father, Olle Westling