In 1810 the Tettnang territory was adjudicated to the Kingdom of Württemberg, whereafter King Frederick vested his daughter Catharina and her husband Jérôme Bonaparte with the titles of Princess and Prince of Montfort.
In 1810 the Tettnang territory was adjudicated to the Kingdom of Württemberg. In 1816, King Frederick I vested his daughter Catharina and her husband Jérôme Bonaparte with the titles of Princess and Prince of Montfort.