Linlithgow Palace . Scotland A royal manor existed on the site in the 12th century. This was replaced by a fortification known as 'the Peel', built in the 14th century by English forces under Edward I. The site of the manor made it an ideal military base for securing the supply routes between Edinburgh Castle and Stirling Castle. The English fort was begun in March 1302 under the supervision of two priests, Richard de Wynepol and Henry de Graundeston.