The Biotechnical Division was a scientific research group of the early Imperium of Man that was formed on Terra before or during the ancient Unification Wars of the late 29th and 30th Millennia by the Emperor of Mankind. Many of its laboratories were located deep beneath what later became the Imperial Palace complex in the Himalazian (Himalayan) Mountains.
By the time of the Horus Heresy in the early 31st Millennium, Astarte had been replaced as director by the even more skilled Terran scientist Ezekiel Sedayne. A portion of Sedayne's personality would later be incorporated into that of Archmagos Dominus Belisarius Cawl and would help to provide the archmagos with his unparalleled skill at genetic engineering.
- Belisarius Cawl: The Great Work (Novel) by Guy Haley, Ch. 19