Mavisbank is a country house outside Loanhead, south of Edinburgh in Midlothian, Scotland. It was designed by the architect William Adam, in collaboration with his client, Sir John Clerk of Penicuik, and was constructed between 1723 and 1727. The first Palladian villa in Scotland, it is described by Historic Scotland as "one of Scotland's most important country houses". The house was altered in the 19th century, but suffered decades of neglect in the 20th century. The interiors were gutted by fire in 1973, and the house remains a ruin.