Question: Augustus d'Este was the grandson of a monarch who was promoted to King of Hanover in what year?
Sentence (from "Augustus d'Este"): His parents were secretly married on 4 April 1793, in a Church of England ceremony in the Hotel Sarmiento, Rome, and later married again on 5 December 1793 at St George's, Hanover Square, Westminster, using their correct names but without revealing their identities.
Relevant evidence: No