Under this prince, who became ruler de jure in 1747, the Convention of Rostock, by which a new constitution was framed for the duchy, was signed in April 1755.
Selle vürsti ajal, kes sai de jure valitsejaks aastal 1747, sõlmiti aprillis 1755 Rostocki konventsioon, millega raamistati uus põhiseadus hertsogkonnale.