Luxembourg's Empire Tiara and any other diamond wall out there. For lack of any official or semi-official name, we are going to call this Princess Franziska's Diamond Tiara - and that sums up pretty much all the information we have about it.
The tiara featuring an undisclosed yet obviously large number of quite large diamonds set in silver was a gift to Countess Franziska of Wrbna and Freudenthal (1799-1863) by her husband Prince Karl of Liechtenstein (1790-1865). The couple had nine children, two of them sons. However, neither of their sons married and died without legitimate issue. Whether the tiara was given to another branch of the Liechtenstein family or to one of Princess Franziska's daughters - four of them had respectively married into the Trauttmansdorff, Salm-Reifferscheidt, Arenberg and Kinsky families and had descendants - remains a mystery. The only thing we know about the whereabouts of the tiara is that it was sold in 1982 at Sotheby's auction in Geneva for 300,000 Swiss francs. So it doesn't still seem to be with the Princely Family - and thus the question of when a wall of diamonds is simply too big to be worn will probably be forever remain unanswered.