In the deed of donation is the first historical mention of the Tachinger See. Beginning in 1275, Taching am See belonged to the Prince-Archbishopric of Salzburg and the town was the site of district administration (Obmannschaft). When the Salzburg lands were secularized in 1803, Taching am See became the property of Ferdinand III of Tuscany.
The earliest written record of the Tachinger See can be found in the deed of donation. From 1275 onwards, Taching am See was under the control of the Prince-Archbishopric of Salzburg and functioned as a local government hub (Obmannschaft). Following the secularization of the Salzburg lands in 1803, Taching am See passed into the possession of Ferdinand III of Tuscany.