Haapsalu Castle

Haapsalu Castle (also Haapsalu Episcopal Castle, Estonian: Haapsalu piiskopilinnus) is a castle with cathedral in Haapsalu, western Estonia. It was founded in the thirteenth century to be a center for the Bishopric of Ösel-Wiek. When there is a full moon in the month of August, it is said that an image of a maiden, the White Lady, appears on the inner wall of the chapel.