Two rival castles stand either side of the village of St Goarshausen. Burg Peterseck was built by the archbishop of Trier to counter the toll practices of the powerful Katzenelnbogen family. The latter responded by building a much bigger castle high on the other side of town, Burg Neukatzenelnbogen (dubbed Burg Katz, meaning 'Cat Castle'). Highlighting the obvious imbalance of power between the Katzenelnbogens and the archbishop, Burg Peterseck was soon nicknamed Burg Maus ('Mouse Castle').