[1] Around the year 1260, the up-rising cavalier family Münch acquired the village on the hills adjacent to the river Birs and established their estate there.

Then, under Hugo Münch IV, the castle was expanded and extended and a ring wall was built around the village during the following 60 years.

Katharina Münch von Münchenstein-Löwenberg died in 1371 and Konrad VIII inherited governance of Muttenz and the three fortresses in the district Wartenburg.

During the "Old Zürich War" (Alemannic German: Alte Zürichrieg), just before the Battle of St. Jakob an der Birs on 26 August 1444, the Solothurner conquered the castle on 17 June 1444 and they kept it occupied.

During the first half of the 15th century, the dynasty of the Münchs began to crumble, and because of the high fiefdom costs, they had to sell the estate to the city.