The castle was built from 1224, with various extensions until the 16th century. Its initial purpose, in addition to being the residence of the Count of Ferrette, was to monitor the toll which regulated passage into the Thur valley. Its name means the “town of the angel” in homage to Saint Michael, chief of the angels and champion of Good, and it stands at the top of the Schlossberg, the “castle mount. » In 1673, Louis The king called on miners from Giromagny to demolish the castle with explosives. When the dungeon collapses, part of it remains stuck on the side, giving the ruins their current shape. The locals nickname the remains of the castle “The Witch’s Eye” because this dungeon evokes an eye watching over the city, but also in connection with the tumultuous past involving the city in witch hunting. Family walk through the old town offering upon arrival a beautiful view of the town and the surrounding hills.