H.R.H. Prince Augustus Frederick, Duke of Sussex, was the 6th son of George III. In addition to the Dukedom of Sussex, he was created Duke of Brunswick-Luneburg, Grand Duke of Mecklenburg-Strelitz, Baron Arklow and Earl of Inverness. Until 1804, he was mainly in continental Europe, and in 1792, when in Rome, he met Lady Augusta Murray, daughter of the Earl of Dunmore, whom he married in 1793, although the union was declared void by his father, George III. Throughout his life, he was a supporter of progressive political reform and also enlightened in the advancement of art and science: he was elected president of the Society of Arts in 1816 and from 1830-1838 was president of the Royal Society.