India, Sept. 4 -- For Friday Fashion Flashback, we revisit the most unforgettable fashion moments, extraordinary creations and iconic pieces that have stood the test of time. This week, we look at some of the most expensive wedding dresses ever created, from royal bridal gowns to celebrity couture. (Also read: Friday Fashion Flashback: The Indian Maharaja who commissioned Cartier's most extraordinary necklace with 2,930 diamonds )

Royal wedding gowns don't get much more extravagant than Queen Letizia of Spain's Manuel Pertegaz creation. When Letizia married then-Crown Prince Felipe in 2004, she wore an ivory gown with long sleeves, a high collar, a deep V neckline and a dramatic train. According to The Knot, the dress is estimated to hav...