Complex sentence: Maximilian became first in line to the Saxon throne as Hereditary Prince (de: "Thronfolger"); but three years later, on 1 September 1830, during the Autumn Disturbances, he renounced his rights of succession in favour of his eldest son Frederick Augustus.
Split into simpler sentences: Maximilian became first in line to the Saxon throne as Hereditary Prince (de: "Thronfolger"). However, three years later, on 1 September 1830, during the Autumn Disturbances, he renounced his rights of succession in favour of his eldest son, Frederick Augustus.