Question: When did Ernst I, Duke Of Saxe-Altenburg's father die?
Sentence (from "Princess Marie Anne of Saxe-Altenburg"): As the eldest daughter of Prince Moritz of Saxe- Altenburg and his wife Princess Augusta of Saxe- Meiningen, and a sister of Ernest II, Duke of Saxe- Altenburg, Marie Anne was a member of the Ducal House of Saxe- Altenburg.
Relevant evidence: No