Princess Margaretha of Luxembourg and Prince Nikolaus of Liechtenstein were married 40 years ago on March 20, 1982 at Notre Dame Cathedral in Luxembourg City. Like her sister a month earlier, Princess Margaretha chose the Congo Diamond Necklace Tiara for her wedding headpiece. A convertible necklace made by Van Cleef and Arpels, the piece had been a wedding gift for to her mother, Princess Josephine of Belgium, in 1953 by the Belgian colony of Congo (read about its fascinating history over at The Court Jeweller). The streamlined tiara was a striking contrast to the ruffled dresses fashionable in the early 1980s- notice the triple tiered ruffles on those sleeves!
Images from Getty as indicated