In the background, Maria Beatrice of Austria-Este & Countess Arco-Zinneberg, wearing a magnificent diamond and ruby tiara to the wedding in Luxembourg of Stephanie de Lannoy and Guillaume. Haven't seen this tiara before or since.
Ceremonial gown, by Norman Hartnell, 1957, at the Victoria and Albert Museum. Designed specially for Queen Elizabeth II's state visit to Paris, April 8-11th, 1957. Decorated with French motifs, including the flowers of France and large gold bees, the emblem of Napoleon. Worn to the state dinner on the first night (Monday 8th April), hosted by President René Coty at the Elysée Palace, followed by a visit to the Opéra (see black-and-white photo, via romanbenedikhanson on Flickr).
Another image of Princess Marie-Gabrielle, wearing a Lover's Knot tiata, the pearls of which seem to be noticably both larger and longer than those in the Bavarian Lover's Knot tiara in the Residez Museum
Bettina Bernadotte Wisborg (L),her husband Philipp Haug (C) and their son attend the royal wedding of Prince Carl Philip of Sweden and Sofia Hellqvist at The Royal Palace on June 2015 in Stockholm, Sweden. (Photo by Gisela Schober/Getty Images)
Cartier Pearl Drop Tiara - (Monaco) was given to Princess Charlotte as a wedding gift from Count Pierre de Polignac, her husband. It was created in 1920 by Cartier. The design of the tiara features hanging pearls that are surrounded by scroll work.