The first castle in Xaintrailles is mentioned in 1259 as being held by three co-lords, all from the Xaintrailles family. It was built in the early 13th century, and what remains are the medieval outer courtyard, the keep, and the embankments of the south and west walls.
Jean Poton de Xaintrailles, a companion of Joan of Arc who died in 1461, followed by his successors Bernard de Lamothe and Antoine de Chamborel, governors of Casteljaloux, undertook constructions in the 15th century: two towers and the north residential wing. In the 16th century, turrets with fan-shaped projections were added to the south elevation, and moats and a drawbridge are mentioned in 1539. In 1570, the castle passed to the Montesquiou family, and later through marriage to the Lau de Lusignan family in 1724.
Around 1780, Armand de Lau, Marquis de Lusignan, had the moats filled in and an access arranged from the west. In 1824, the northeast rooms collapsed, and in 1843, the keep was partially restored based on the project of Gustave Bourières, the department's architect.
The oldest part of the castle is the 13th-century keep, with windows added in the 15th century. The north residential wing from the 15th century has one square floor and two attic floors with a hipped roof covered with flat tiles. Like the keep, it has an out-of-service staircase. The one-story and attic south building with turrets was renovated (kitchens). The west wing is flanked by two towers.
The U-shaped staircase and vestibule were added in the 18th century.
The Pilgrimage Church of Wies (Wieskirche) is an oval rococo church, designed in the late 1740s by Dominikus Zimmermann. It is located in the foothills of the Alps in the municipality of Steingaden.
The sanctuary of Wies is a pilgrimage church extraordinarily well-preserved in the beautiful setting of an Alpine valley, and is a perfect masterpiece of Rococo art and creative genius, as well as an exceptional testimony to a civilization that has disappeared.
The hamlet of Wies, in 1738, is said to have been the setting of a miracle in which tears were seen on a simple wooden figure of Christ mounted on a column that was no longer venerated by the Premonstratensian monks of the Abbey. A wooden chapel constructed in the fields housed the miraculous statue for some time. However, pilgrims from Germany, Austria, Bohemia, and even Italy became so numerous that the Abbot of the Premonstratensians of Steingaden decided to construct a splendid sanctuary.