Burg Münzenberg) is a ruined hill castle in the town of the same name in the Wetteraukreis, Hesse, Germany.

Their daughter, Gertrud (b. c. 1065, d. before 1093) married Eberhard von Hagen (1075-1122), lord of Burg Hayn [de] near Frankfurt, who moved his seat to Arnsburg and changed his name to "von Hagen und Arnsburg".

Konrad II exchanged properties with Fulda Abbey, receiving the land around Münzenberg Castle.

[1]: 5  He was the chamberlain of Emperor Frederick II who wished to preserve the Wetterau region as imperial Crown land, and thus agreed that his faithful built a prominent castle dominating the country far and wide.

It is generally assumed that during the time of Kuno I, significant parts of the ring wall around the main castle, the Romanesque palace, the eastern keep, the gate building with the chapel above it and parts of the kitchen building were built.

His three younger brothers having died without male issue, the two remaining sisters partitioned the inheritance.

In 1514 the Romanesque part was altered in late Gothic style and a large western and four smaller battery towers inserted into the outer curtain wall.

A striking feature of Münzenberg Castle is that it has two tall defensive towers, a structure known as a bergfried (Thompson 2008).