Reichsfürst
In 1664, Count Hermann Egon of Fürstenberg-Heiligenberg and his brothers, the bishops Franz Egon of Strasbourg and Cardinal Wilhelm Egon von Fürstenberg, became Princes of the Holy Roman Empire. In 1667, the county of Fürstenberg-Heiligenberg was formally raised to a principality and received a vote in the Imperial Diet. After the Fürstenberg-Heiligenberg branch of the family became extinct in 1716, the counts Froben Ferdinand of Fürstenberg-Messkirch and Joseph Wilhelm Ernst of Fürstenberg-Stühlingen became princes of the Holy Roman Empire.