Lorgar led his Legion throughout the Great Crusade, the Word Bearers seeking to eliminate all blasphemy and heresy within the new Imperium. Ancient texts and icons were burned. The construction of vast monuments and cathedrals venerating the Emperor was supervised. The greatest Chaplains of the Word Bearers produced enormous works on the divinity and righteousness of the Emperor, and gave grand speeches and sermons to the masses. The progress of the Word Bearers was slow, but domination of the defeated was complete. At some point during this period, Lorgar penned the Lectitio Divinitatus, postulating the worship of the Emperor as a divine being. This book would later become instrumental in the founding of the Imperial Cult.