Alchemical illustration from <n>Elias Ashmole</n>'s <n>Theatrum Chemicum Britannicum</n>, published in 1652.

Detail from <n>The Accolade</n> (1901) by <n>Edmund Blair Leighton</n>.

An emblem from <n>Jean Baudoin</n>'s 1638 book, <n>Recveil D'Emblemes Divers</n>.

<n>The Wound of Christ as the Fountain of Life</n>, from a German prayer book, c. 1500.

French Emblems: Pictura of Scève, Maurice: Délie (1544): ENTRE TOUTES UNE PARFAICTE.

Detail of <n>Amor Victorious</n> (c. 1602) by <n>Caravaggio</n>.

Provido Consilio, a 17th-century engraved bookplate for <n>Joannes Philippus Papius</n>.

Image for the <n>El Camino de la Curandera</n> course from <n>Savia Alquimia</n>.

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<n>Figura Cabalæ</n>, an engraving from <n>Heinrich Khunrath</n>'s alchemical text <n>Amphitheatrum Sapientiae Aeternae</n>, 1609.

A 1682 copper engraving from <n>Jacob Böhme</n>'s work '<n>Der Weg zu Christo</n>.'

A detail from <n>The Apparition</n> (1885), an oil painting by artist <n>James Tissot</n>.

The <n>Flammarion engraving</n>, a wood engraving by an unknown artist from <n>Camille Flammarion</n>'s 1888 book.

An illustration from <n>Filippo Picinelli</n>'s <n>Mundus Symbolicus</n>, 1681.

<n>The Tree of knowledge of good and evil</n>, a Rosicrucian illustration by the <n>German School</n>, c. 1785.

A portrait of <n>Saint Clare of Assisi</n>.

A detail from <n>The Immaculate Conception</n> (c. 1628-29) by <n>Peter Paul Rubens</n>.

Detail of the painting <n>Saint Paul</n> (1611) by artist <n>Peter Paul Rubens</n>.

<n>Young Woman Holding a Sunflower</n> (c. 1647) by Dutch artist <n>Bartholomeus van der Helst</n>.

A photoshoot co-created by <n>Melanie Parent</n>.

Engraving from <n>Michael Maier</n>'s alchemical emblem book, <n>Atalanta Fugiens</n> (1617).

A still from the 1935 film <n>A Midsummer Night's Dream</n>, directed by <n>Max Reinhardt</n> and <n>William Dieterle</n>.

A 1613 woodcut from <n>Azoth, sive Aureliae occcultae philosophorum</n> by alchemist <n>Basilius Valentinus</n>.

A detail from <n>The Flight into Egypt</n> (1609) by <n>Adam Elsheimer</n>.

A detail from <n>Guillaume Seignac</n>'s 1895 painting, <n>Psyche</n>.

<n>Great Nebula in Andromeda</n>, photographed by <n>George Willis Ritchey</n> at <n>Yerkes Observatory</n> in 1901.

A detail from <n>Incostanza. An Allegory of Fickleness</n> by artist <n>Abraham I Janssens</n>.

Cover art for <n>Darvaza</n>'s album <n>The Silver Chalice</n>. Original illustration by <n>David G. Ljungdahl</n> (1766).

A detail from <n>Edwin Austin Abbey</n>'s <n>Pre-Raphaelite</n> painting, <n>King Lear, Act I, Scene I</n> (1898).

<n>The ladder of the intellect rising to God</n>, an engraving by <n>Robert Fludd</n> from 1619.