Burg Neu-Tannegg, Medieval castle ruins near Boll, Germany

Burg Neu-Tannegg is a castle ruin in the Black Forest near Bonndorf, situated on a mountain ridge to the east of the Boll district. The remains show the layout of a medieval fortress with stone walls scattered across the wooded terrain.

The castle was first mentioned around 1160 and changed hands several times before coming under the Counts of Lupfen in 1467. An earlier landslide around 1400 had already damaged the northern section significantly.

From 1460 the site appears in records only as a "Burgstall", a deserted castle place, after a landslide around 1400 had already taken the northern part. The name Neu-Tannegg came from the Lords of Tannegg, who held it in the mid-13th century; nearby stood Alt-Tannegg. In 1829 Godefroy Engelmann made a lithograph after a drawing by Maximilian von Ring.

The ruin stands at 695 m above sea level on a ridge above the Wutach Gorge near Boll. The site is closed to visitors: a "Zutritt verboten" sign at the entrance forbids access because of the risk of collapse. The remains of the enclosing walls, the south side of the palas and the neck ditch can therefore only be viewed from outside.

The castle was probably built to control the Dietfurt ford on the Wutach. In 1829 Godefroy Engelmann made a lithograph after a drawing by Maximilian von Ring, which records the ruins as they appeared then.