Headpieces and tiara's in history:

Tiaras, bridal headpieces and veils are thought to date back as far as the Roman Empire, where brides were covered with bright red and yellow wedding bridal veils to protect them from evil spirits that might whisk them away before entering the safe union with their husband. The fabric was meant to completely hide the beauty from the malicious intent of bad spirits.

In Eastern Orthodox weddings, a decorative crowning is placed on both the bride's and the groom's head. Then, the headpieces are blessed and exchanged three times. After this ceremonial exchange, the couple is pronounced married.

Bridal headpieces and veils are also traditional in Finnish weddings. After the union ceremony, there is a dance where the bride places her headpiece or bridal comb veil on one of the bridesmaids. Like the Western tradition of throwing the bouquet, this Finnish practice means that the designated bridesmaid will be the next to marry.

TIARAS also known as DIADEMS.  The wearing of a diadem as a mark of nobility or royalty is an extremely ancient custom, and the forms which diadems have assumed are so diverse that it is very difficult to generalize about them or to trace a continuous line of development.  The diadems of some of the Eastern Kings in ancient times were extremely ornate and heavy, while in classical times supreme power was often denoted in the simplest way - by a band of cloth worn round the head and tied in a knot behind.  When Gibbon says of Diocletian that he "ventured to assume the diadem", the diadem in question was only a fillet of white cloth set with pearls.  Yet much richer head-dresses had been worn at an earlier date, notably by the Egyptians.

Some of the diadems of the Egyptian princesses are amazingly delicate.  One which belonged to the Princess Khnemt is made of delicate flowers in gold wire, inlaid with stones, and has all the fragility of a wreath made of real wild flowers.