His mother , the Dowager Princess Johanna Elisabeth , acted as regent on his behalf until 1752 .
Frederick Augustus succeeded his father in Anhalt - Zerbst in 1747 , at the age of thirteen .
Frederick Augustus ' mother , the Dowager Princess Johanna Elisabeth , acted as regent on his behalf until 1752 .
Frederick Augustus succeeded his father in Anhalt - Zerbst in 1747 , at the age of thirteen .