Luxembourg - 1924 - 10 Centimes - Charlotte (Charlotte Adelgonde Elisabeth Marie Wilhelmine; 23 January 1896 – 9 July 1985) was Grand Duchess of Luxembourg from 14 January 1919 until her abdication on 12 November 1964. Her reign is the longest of any Luxembourgish monarch since 1815 when the country was elevated to a Grand Duchy.