Princess Louise received her mother’s blessing to marry John Campbell, Marquess of Lorne, later Duke of Argyll; the couple became engaged on 3 October 1870. Louise was the only one of Queen Victoria and Prince Albert’s children to marry into the aristocracy, rather than another royal house. The couple married on 21 March 1871 in St George’s Chapel, Windsor Castle. Photographed here on her wedding day, Louise wore a dress of Honiton lace along with a veil that she had designed herself.