Pusarnitz already appeared in a 1072 deed. After the Counts of Lurn became extinct in 1135, it was among the Carinthian possessions of the Salzburg archbishops. The remaining estates were inherited by the Counts of Ortenburg, while the Tyrolean Meinhardiner dynasty, Counts of Görz since 1127, expanded their possessions in the west. The main village Möllbrücke was first mentioned as "mölnprukke" in 1253. In 1307 it was denoted as a possession of the Meinhardiner counts of Görz and seat of a county court.