|The Ancona Tiara|
"The Ancona Tiara is a pearl and diamond tiara with Italian heritage. The body of the tiara includes groups of three round pearls in diamond trefoil surrounds on a pearl and gold base. The tiara is topped with pearls in two rows, a lower row of round pearls and a top row of upright drop pearls which are slightly irregular in shape - clearly old, baroque pearls. And old this tiara is indeed: it was made for Princess Maria Anna Carolina of Saxony (1799-1832) sometime around her 1817 marriage to Leopold II, Grand Duke of Tuscany."
From one of my favorite royal jewelry blogs: http://orderofsplendor.blogspot.com/