Burg Treswitz (the village Burgtreswitz is named after the castle) was probably built in the early 12th century when the area came to the Counts of Sulzberg. During the Thirty Years' War , the castle was largely destroyed along with all of the supplies stored there in 1634. The reconstruction then dragged on in several stages over decades. In 1698 the castle was improved by the construction of a horse stable and the installation of vaults. In 1701 the castle stadel was demolished and completely rebuilt.
The castle is a two-storey, roughly three-winged building with a gable roof around a closed inner courtyard. One side of the gatehouse to the north, which is covered with a hipped roof, is bent so that the inner courtyard forms an irregular trapezoid. The castle was secured to the south by a steep slope, to the west and northwest a moat was dug.
The former keep was at the southern tip. The gate construction protrudes about 3 m from the line of the wall. The entrance gate is a wooden star gate with the initials of the Lords of Lichtenstern. Above the archway (dated 1786) there is a Gothic, Electoral Palatinate coat of arms relief from approx. 1340.
The western wall dates from the time the castle was built, the eastern wall can be assigned to the baroque construction phase (around 1650). To the left of the gate tower you get to the former dining room with groined vaults and a keystone of the Lichtensterner (six-pointed star). The castle chapel was in this area before the destruction in the Thirty Years War housed.
The chapel was moved to the southern part of the castle at the end of the 17th century. In the 19th century this chapel 'To our dear lady' was also used for brewery purposes. The southwest corner collapsed in 1930 and was rebuilt with bricks (Gothic wall remains in the base).
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