When criticized about the lack of architecture in Anna Karenina, connecting the themes of Levin and Anna Karenina, Tolstoj disagreed: "The arches of the vault are brought together in such a way that it is even impossible to notice where the keystone is." This book explores the architecture, attempting to trace the pattern of the invisible pillars that support the 'arches' on both side of the 'vault', leading to the discovery of the 'keystone' which Tolstoj tried so hard to keep invisible.