<div>Volume I of CALA presents the first edition of Hall ar-Rumuz (Explanation of the Symbols), one of the most important representatives of the symbolic branch of alchemy. Ibn Umail’s description of the alchemical work is a symbolic rendering of his experience of an inner-psychic process of transformation that he considered as being the highest goal in human life. Ibn Umail’s symbolic attitude facilitates a kind of inter-confessionalism: he states in Hall ar-Rumuz that "the result of the alchemical work can be produced by a person from any religion". The psychic transformation achieved by the work leads to the stone, a symbol for the solidified divine kernel of an individual. This center also has a collective dimension. Thus Ibn Umail also names the stone "mosque" or "temple". His work connects and bridges the Ancient Egyptian quest for immortality directly with later Latin alchemy and the modern depth psychology of C.G. Jung with its aim of creating spiritual gold: consciousness. Ibn Umail’s work thus constitutes an important cultural link in the history of the spiritual aspect of alchemy.</div>