Answer: Mark Twain's two famous historical novels are A Connecticut Yankee in King Arthur's Court and The Prince and the Pauper.
Explanation: A historical novel is a novel whose setting is located in the past. Moreover, this type of fiction makes reference to the spirit and the economic and social conditions of that period. Twain's A Connecticut Yankee in King Arthur's Court tells the story of an engineer from Connecticut who travels to the past, more specifically to the time of King Arthur's reign. Moreover, The Prince and the Pauper is set in 1547 and it focuses on the story of Tom Canty and Prince Edward, King Henry's son.