Landgrave of Hesse-Kassel
Frederick became Landgrave of Hesse only in 1730, ten years after becoming King of Sweden. He immediately appointed his younger brother William governor of Hesse.
As Landgrave, Frederick is generally not seen as a success. Indeed, he did concentrate more on Sweden, and due to his negotiated, compromise-like ascension to the throne there, he and his court had a very low income. The money for that very expensive court, then, since the 1730s came from wealthy Hesse, and this means that Frederick essentially behaved like an absentee landlord and drained Hessian resources to finance life in Sweden. Also, Frederick's father, Charles I of Hesse-Kassel, had been the state's most successful ruler, rebuilding the state over his decades-long rule by means of economic and infrastructure measures and state reform, as well as tolerance, such as attracting, for economic purposes, the French Huguenots. His brother the governor, who would succeed Frederick as Landgrave William VIII of Hesse-Kassel, though by background a distinguished soldier, was likewise a great success locally. There are very few physical remainders of Frederick in Hesse today; one of them is his large Royal Swedish paraph (FR) over the old door of the University of Marburg's former riding hall, now the Institute of Physical Education.
Read more about this topic: Frederick I Of Sweden