The stages of salvation history - Ninth vision of Hildegard von Bingen The Book of Divine Works - Liber divinorum operum Lucca Biblioteca statale ms 1942 - Codex Latinus 1942 fol-135r [Completed in 1174] The city in the square is the celestial or heavenly Jerusalem with Wisdom and God Voice of the Living Light: Hildegard of Bingen and her World edited by Barbara Newman - Berkeley: University of California Press, 1998; ISBN 0-520-21758-6.
