Overview
The Liber de compositione alchemiae, also known as the Testamentum Morieni, the Morienus, or by its Arabic title Masāʾil Khālid li-Maryānus al-rāhib, is a work on alchemy falsely attributed to the Umayyad prince Khalid ibn Yazid. It is generally considered to be the first Latin translation of an Arabic work on alchemy into Latin, completed on 11 February 1144 by the English Arabist Robert of Chester.