This novel is a fictional account of the life of St. Helena, the mother of Constantine. And what a delightful book! I feared it would be cheesy, but Evelyn Waugh draws on a wide range of sources, and where he fills in the gaps, he does so in a way that is plausible and entertaining. (Sometimes he is certainly making things up, but this is usually obvious and with great comic effect.) Coming from Evelyn Waugh, it has a humor similar in tone to Brideshead Revisited, but usually more obviously funny and without such long periods of melancholy in between.