The Princess Louise (Louise Caroline Alberta: Marquess of Lorne and Duchess of Argyll by marriage; 18 March 1848 – 3 December 1939) was the fourth daughter of Queen Victoria and Prince Albert. She was interested in sculpture, and was a notable architect. In 1871, she married John, Marquess of Lorne (Duke of Argyll from 1900), but the marriage was unhappy. They made up with each other in the 1900s, and after Argyll's death in 1914, she had a nervous breakdown. She died in 1939 at the age of 91.