Essen crown. The small crown is the oldest surviving crown of lilies in Europe. It is stored for almost a millennium in the Essen treasury. It was used until the 16th century at the coronation of the Golden Madonna at the Candlemas on February 2nd. The gold band with 4 lilies is decorated with filigree patterns of coupled gold wires, set with pearls and precious stones. The crown was created at the second half of the 11th century. The origin of the crown is unclear.
Diamond Flower Tiara of Queen Amelie of Greece. There is a discussion, in German, of the queen and the Oldenburg flower tiara, here: http://www.royal-magazin.de/german/oldenburg/koenigin-amalia-wittelsbach-griechenland.htm It's in German, or badly translated into English, and I don't think it mentions where the tiara is presently, if it still exists.