Peel Castle occupies the whole of St Patrick's Isle, a small tidal island off Peel on the Isle of Man's west coast. It was originally fortified by Norse rulers in the 11th century under King Magnus Barefoot, beginning as timber defences later rebuilt largely in local red sandstone during the early 14th century. The site was also the seat of the Diocese of Sodor and Man, home to the Cathedral of St German, until the cathedral fell out of use in the 18th century. Excavations between 1982 and 1987 uncovered the 10th-century grave of the so-called 'Pagan Lady' furnished with Norse grave goods, along with a hoard of silver coins from around 1030. Now cared for by Manx National Heritage, the castle appears on the reverse of the Isle of Man's £10 banknote and remains one of the island's most visited heritage sites.