From Edward's death, Alexandra was queen mother, being a dowager queen and the mother of the reigning monarch. She did not attend her son's coronation in 1911 since it was not customary for a crowned queen to attend the coronation of another king or queen, but otherwise continued the public side of her life, devoting time to her charitable causes. One such cause included Alexandra Rose Day, where artificial roses made by people with disabilities were sold in aid of hospitals by women volunteers. During the First World War, the custom of hanging the banners of foreign princes invested with Britain's highest order of knighthood, the Order of the Garter, in St George's Chapel, Windsor Castle, came under criticism, as the German members of the Order were fighting against Britain. Alexandra joined calls to "have down those hateful German banners". Driven by public opinion, but against his own wishes, the king had the banners removed but to Alexandra's dismay he had down not only "those vile Prussian banners" but also those of her Hessian relations who were, in her opinion, "simply Soldiers or vassals under that brutal German Emperor's orders". On 17 September 1916, she was at Sandringham during a Zeppelin air raid, but far worse was to befall other members of her family. In Russia, her nephew Tsar Nicholas II was overthrown and he, his wife and children were killed by Revolutionaries. Her sister the Dowager Empress was rescued from Russia in 1919 by HMS Marlborough and brought to England, where she lived for some time with Alexandra.