Question: When was Dorothea Marie Of Saxe-Gotha-Altenburg's husband born?
Sentence (from "Dorothea Marie of Saxe-Gotha-Altenburg"): She was the daughter of Frederick I, Duke of Saxe- Gotha- Altenburg and his first wife, Magdalena Sybille of Saxe- Weissenfels.
Relevant evidence: No