Burg Lohrbach, Water castle in Lohrbach, Mosbach, Germany.

Burg Lohrbach is a water castle in the Lohrbach district of Mosbach. Its core is surrounded by a broad moat, with an outer bailey ringed by a second, outer ditch. The rectangular gate tower bears the coat of arms of Otto I of Mosbach. The north wing retains Gothic window profiles, and the complex includes a tithe barn with a round tower.

Burg Lohrbach is a water castle from the 10th century. Around 1000 it supposedly came as an imperial fief to the Counts of Lauffen; after their extinction it passed through the Lords of Dürn in 1251 to the Lords of Limpurg. Around 1291 Ulrich von Lorbach, a younger son of Walter II of Limpurg who joined the Knights of Saint John, brought it to that order, which sold it before 1350 to Konrad von Limpurg. In 1413 Otto I of Mosbach bought it from the Limpurgs.

The name Lohrbach comes from Ulrich von Lorbach, a younger son of Walter II of Limpurg, who was named after his seat there and joined the Knights of Saint John around 1291. From 1576 to 1599 the castle was the widow's residence of Electress Amalie, and later it housed a Palatine cellar office administering 18 villages and several farms.

The castle is privately owned and cannot be visited; the buildings are divided into apartments and holiday flats. The ring moats, now dry, remain partly visible, and the well-preserved gate tower with Otto I's coat of arms can be seen from outside. The former tithe barn with its round tower, used as the village church until 1966, was converted into housing and commercial space.

The rectangular gate tower bears the coat of arms of Otto I of Mosbach, who acquired the castle in 1413; the tower was likely built or renewed under his rule. The castle is privately owned and cannot be visited, but the tower is visible from the street.