Isabelle de Steiger, née Lace (28 February 1836 – 1 January 1927), was an English painter, theosophist, occultist and writer.

The couple divided their time between England and Switzerland, then settled down, for professional reasons, in Egypt, where her husband died of Tuberculosis in 1870.

Her style was strongly influenced by Lawrence Alma-Tadema and his historical paintings, such as Cleopatra after the Battle of Actium etc.

She came into contact with Madame Blavatsky, Mabel Collins and Anna Kingsford, the latter being especially esteemed by Steiger and becoming a close friend.

[1][4] Steiger wrote several books on mystical subjects, including a translation of Karl von Eckartshausen's "Cloud upon the Sanctuary", and an autobiography.