Henry Arundell, 3rd Baron Arundell of Wardour, PC (bef. 23 February 1607/828 December 1694) was a Peer of England during the 17th century, and the most famous of the Lords Arundell of Wardour. He served as Lord Privy Seal and Lord High Steward, and was appointed to the Privy Council. During the Popish Plot he suffered a long period of imprisonment, although he was never brought to trial. Early life He was baptised on 23 February 1607/8 at St Andrew, Holborn, London. On the death of his father, who had been mortally wounded at the Battle of Stratton, on 19 May 1643 he succeeded to his estates and to his titles, which included that of Count of the Holy Roman Empire. Throughout his life a devoted Roman Catholic, he fought like his father on the side of Charles I in the First English Civil War. In May 1643 the parliamentarians wrested his ancestral home Wardour Castle, in Wiltshire, from his mother Lady Blanche Arundell who was defending it. In the following September Arundell laid siege to the castle and its new occupiers and fought in the re-taking from the rebels. By springing a mine and ruining the building, he finally dislodged the enemy under General Edmund Ludlow in March 1644, partly destroying it to prevent it being used as a fortress. Career On 13 May 1652 he acted as one of the seconds of his brother-in-law Colonel Henry Compton, in a duel with George Brydges, 6th Baron Chandos. Compton was killed, and a warrant was issued by the council of state to arrest Arundell with others who had taken part. On 17 May 1653, he was found guilty of manslaughter and sentenced to be burned in the hand. In that year Arundell appears to have petitioned Oliver Cromwell for pardon, and in 1656 to have received permission to take refuge in France. At the Restoration of Charles II, Arundell, on paying £35,000, was confirmed in all his family estates, many of which had been sold by the Commonwealth to Humphrey Weld. He regained possession of Wardour, but never had the money to properly rebuild it. On 7 March 1663 he was nominated and held the office of Master of the Horse to the Queen-Mother, Henrietta Maria. In January 1669 he was summoned by Charles II of England, with other Roman Catholic peers, to a secret council, and was commissioned to