Schlossturm Auerbach, Medieval castle tower in Auerbach, Germany.

Schlossturm Auerbach is the round keep of the former Burg Auerbach, standing 43 meters tall on a hill spur. Its lower section is the medieval bergfried, with an outer diameter of nine meters. The tower was raised in 1909 and given a tiled roof; the surrounding castle area, 35 meters across, is partly built over, and cellars of the former outer bailey survive in the Rittergut grounds.

The tower originated in the 12th century as part of a larger castle complex and first appeared in documents in 1348 under the name Castrum Urbach. This early documentation reveals that the fortification had already been in use for four centuries before being recorded in writing.

The tower's name changed with its uses: the medieval keep became an observation tower after 1849, and since 15 January 1911 the castle building has housed the Schloßschänke inn. The site is protected as an archaeological monument, listed on 7 December 1977.

The tower is reached by a wooden spiral staircase installed in 1849, when the industrialist Keffel rebuilt the ruin as an observation tower. The city of Auerbach bought the site in 1909 and raised the tower, replacing its wooden cap with a tiled roof. The stair is steep and narrow, so wear sturdy shoes.

The tower's high entrance sat 12 metres up and was reached only by rope ladder; a second doorway from the neighbouring building's attic was added in 1705. The round shaft, 43 metres tall, keeps the medieval keep in its lower part, nine metres across outside.