Castle Richmond is the third of five novels set in Ireland by Anthony Trollope. The unusually complicated plot features the competition of two Protestant cousins of English origin, Owen Fitzgerald and Herbert Fitzgerald, for the hand of Clara Desmond, the noble but impoverished daughter of the widowed Countess of Desmond, providing the novel's principal dramatic interest. Castle Richmond was the first of several novels by Trollope in which bigamy played an important role.