The novel Helena (1950) is analyzed as Evelyn Waugh’s profound statement on his most significant problems: the possibility to resolve the crises of the 20th-century consciousness through Christianity and on the nature of power. Cradle Anglo-Catholics were always suspicious of Waugh, seeing him as an errant Catholic; the paper uses the work of Waugh’s biographers and interpreters to pinpoint his personal reception of Catholicism as the most sophisticated, strictly logical system, firmly grounded in historical fact. Waugh’s story of St. Helena is simultaneously a biography of half-legendary Saint, known for her discovery of the Cross of Golgotha, who thus proved the truthfulness of the founding Christian narrative, and an ironic modern historical novel on the decline of the Roman Empire. Many parallels between the period of Helena’s husband and son (Constantius Chlor and Constantine the Great, respectively) and the catastrophic history of the 20th century are suggested through the devices of anachronism, grotesque, figurative style. The author depicts the persistence of paganism, the use of religious cults as political instrument by cynical persons in their pursuit of individual power. High dose of irony prevents the novel from going in the direction of hagiography; nevertheless the author’s concept of his title character brings to life the most positive and optimistic text in Waugh’s whole oeuvre. By the end of her long life, by converting to Christianity, Helena finds her vocation, her providential mission, completes it, and gains in the fact satisfaction and peace.