Question: Wilhelm von Lenz, was a Baltic German Russian official and writer, and was a friend of many mid-century Romantic composers, including Hector Berlioz, that died on which date, was a French Romantic composer, best known for his compositions "Symphonie fantastique" and "Grande messe des morts" (Requiem)?
Facts:
Wilhelm von Lenz was a Baltic German Russian official and writer.
Hector Berlioz died on 8 March 1869
Answer: 8 March 1869