The jewel remained in the possession of Prussia's ruling House of Hohenzollern for the next 179 years, surviving the 1806 invasion of Napoleon and seeing the rise of the Kings of Prussia to become German Emperors. The "Beau Sancy" retained its exalted position amongst the crown jewels, but was reset several times as a pendant, which it was customary for the bride to wear at royal weddings. The last Empress to wear the diamond was Augusta Victoria, wife of Wilhelm II. The last "Kaiser" abdicated the throne at the end of the First World War in 1918 and went into exile in the Netherlands, but the stone remained in Berlin. At the end of the Second World War, it was transferred to a bricked-up crypt for safe-keeping, where it was found by British troops and returned to the estate of the House of Prussia. In the decades following the war, the "Beau Sancy" was occasionally exhibited publicly. In 1972 it was shown in Helsinki together with its sibling diamond the "Sancy", at which point the two diamonds had been separated for 370 years.