Dover House is a Grade I-listed mansion in Whitehall and the London headquarters of the Office of the Secretary of State for Scotland. Dover House was designed by James Paine as the London townhouse of the Rockinghamite Whig MP Matthew Fetherstonhaugh during the 1750s, and it was remodelled by Henry Flitcroft as "Montagu House" for George Montagu, 1st Duke of Montagu and by Henry Holland for Prince Frederick, Duke of York and Albany from 1788 to 1792. Dover House was also home to a French ambassador and Lady Caroline Lamb, a lover of Lord Byron. The last private owners were the family of Whig politician Georgre Agar-Ellis, 1st Baron Dover, for whom the house is named. The Agar-Ellis heirs owned Dover House from 1830 to 1885, when it became the Scottish Office. It was also used by the Colonial Office for several years, and Zionist terrorists planted a bomb there in April 1947. In 1999, the Scottish Office was transformed into the Scotland Office on Scottish devolution.