The Lectitio Divinitatus (also sometimes spelled Lectio Divinitatus) was a religious book penned by the Primarch Lorgar of the Word Bearers Space Marine Legion during the Great Crusade of the late 30th Millennium, before his fall to Chaos. The book, and later the religious movement that it spawned, postulated the worship of the Emperor of Mankind as a divine being, the one, true God of humanity.