Burg Ascheberg, Medieval castle ruins in Steinfurt, Germany.

Burg Ascheberg comprises medieval castle ruins with two separate courtyards, each roughly 40 by 40 meters in size. The foundations are built from local stone and mortar and reveal the layout where residential buildings and fortifications once stood.

The castle was probably built in the Carolingian period and was the ancestral seat of the noble lords of Ascheberg. According to a 15th-century chronicle of the Johanniterkommende Steinfurt, it was destroyed around 1164 in a feud between the lords of Ascheberg and the noble lords of Steinfurt. Excavations in 1900 under Johann Heinrich Schmedding first revealed its foundations, and re-excavations in 2010 confirmed his findings.

The name Ascheberg comes from the edelfrei lords of Ascheberg, whose seat the castle was in the Middle Ages. A 15th-century chronicle of the Johanniterkommende Steinfurt records that the castle was destroyed around 1164 in a feud between the lords of Ascheberg and the edelfreien lords of Steinfurt. Field names around the ruin still point to Haus Ascheberg.

The site is accessible via marked paths with informational panels that help explain the remains. Visitors can explore the foundations at their own pace and gain a clear sense of the scale and layout of the former stronghold.

Early 20th century excavations uncovered a polygonal keep and a roughly 11-meter-long palace structure on the grounds. These discoveries revealed building techniques and layouts that taught researchers about how noble families lived in Westphalia.