Itinerarium exstaticum

Lore & Background

The work relates how, lulled into a sleepy reverie by a concert of sacred music in the Jesuit College, Theodidactus finds himself guided through the heavens by a guiding angel. Kircher depicts stars of different sizes, accompanied by planets, turning around each other and moving through space. The stars, as he described them, were 'fixed' but moved in circular orbits sometimes in systems of binary stars or multiple stars, with vast distances between them. As he believed they were very far away and all moved around the Earth (a geocentric model), Kircher believed that they moved with tremendous speed.

Kircher had argued against the cosmological theories of Kepler and Galileo in his later works, though his 1641 work *Magnes sive de Arte Magnetica* did not primarily focus on cosmology. He had continued writing on astronomy, including the substantial astronomical content in his 1646 work *Ars Magna Lucis et Umbrae*. The manuscript was reviewed by Jesuit censors before publication, with some misgivings that it included views 'dangerous to faith.'

Reader's Guide

Itinerarium exstaticum is significant as the only work by Athanasius Kircher devoted entirely to astronomy and one of only two pieces of imaginative fiction by him. It represents a rare venture by a 17th-century Jesuit into speculative space exploration, anticipating later science fiction. The work's departure from Aristotelian cosmology, its support of the Tychonic model, and its ideas about planetary composition and sunspots drew criticism from contemporaries. The revised second edition, Iter Exstaticum (1660), prepared by his student Kaspar Schott, included refutations of critics. The work's legacy includes its influence on cosmological debates and its status as an early example of astronomical fiction. A copy of the 1660 edition was once in the Library of Sir Thomas Browne. The only known translation from Latin is an unpublished manuscript version composed in France between 1722 and 1736.

Did You Know?

• Itinerarium exstaticum is the only work by Kircher devoted entirely to astronomy.
• The work was dedicated to Queen Christina of Sweden, who visited the Vatican just after it was published.
• The frontispiece of the 1660 edition was the work of Nuremberg engraver Johann Friedrich Fleischberger.
• A copy of the 1660 revised edition is listed as once in the Library of Sir Thomas Browne.

Narrative & Cosmological Vision

The story opens with Theodidactus, whose name translates as 'taught by God,' dozing off during a performance of sacred music at the Jesuit College. An angel named Cosmiel then takes him on a sweeping journey through the heavens. Kircher's vision was striking for a seventeenth-century Jesuit: he imagined stars of varying sizes, each accompanied by its own planets, all turning and traveling through space. These 'fixed' stars moved in circular orbits, sometimes in binary or multiple-star systems, separated by vast distances. Because Kircher maintained a geocentric framework in which everything revolved around Earth, he concluded that these distant celestial bodies must travel at tremendous speeds. The work endorsed the Tychonic model, placing Earth at the center while other planets orbited the Sun. Yet Kircher also broke with Aristotle by asserting that all planets shared the same material composition as Earth and that sunspots were genuine phenomena. As Kircher's sole work devoted entirely to astronomy and one of only two imaginative fictions he ever produced, the text stands as a remarkable creative and intellectual achievement.

Theological & Institutional Tensions

The path to publication was anything but smooth. As was standard practice, Kircher's manuscript passed through Jesuit censors before the Superior of the order could grant approval. The reviewers expressed concern that certain views in the text were 'dangerous to faith,' a pointed warning given the era's sensitivities. Once published in 1656, the book drew considerable criticism for its departure from the Aristotelian cosmology that the Catholic Church had essentially upheld since the trial of Galileo. Kircher's embrace of the Tychonic system—Earth at the center, planets orbiting the Sun—was a significant step, but his further claims that planets were composed of the same material as Earth and that sunspots were real phenomena pushed even further from accepted doctrine. Rather than mounting his own defense against the critics, Kircher entrusted the task to his student Kaspar Schott, who prepared a revised and expanded second edition in 1660 under the title Iter Exstaticum, incorporating additional arguments to counter the objections raised.

Publication Context & the Revised Edition

The 1656 first edition emerged against a backdrop of royal and imperial attention. The preface credits encouragement from Emperor Ferdinand III, and the book was dedicated to Queen Christina of Sweden, who visited the Vatican shortly after publication. Kircher had last engaged with cosmological theory in his 1641 work Magnes sive de Arte Magnetica, where he had argued against both Kepler and Galileo; the reasons for his return to the subject remain unclear. The 1660 Iter Exstaticum, prepared by Kaspar Schott, added explanatory diagrams absent from the original. Its frontispiece, engraved by Nuremberg artist Johann Friedrich Fleischberger, shows Kircher holding a compass beside the angel Cosmiel, who gestures toward a vast image of the Tychonic universe with God's name in Hebrew above all. A companion piece, Iter Exstaticum II (1657), sent Theodidactus in the opposite direction—beneath the Earth—and was advertised as a prelude to Kircher's Mundus Subterraneus. Together, these two works represent the entirety of Kircher's foray into imaginative fiction.

Legacy & Afterlife

Beyond its original seventeenth-century readership, Itinerarium exstaticum has left a trace across centuries and media. The only known translation from Latin is an unpublished French manuscript, Voyage extatique dans les globes célestes, composed somewhere in France between 1722 and 1736. A copy of the 1660 revised edition was once part of the personal library of the English physician and writer Sir Thomas Browne, linking the work to the broader intellectual culture of the period. In modern scholarship, the text is recognized as a landmark in the history of science fiction; Adam Roberts discusses it in his survey of seventeenth-century speculative fiction, and John Clute includes Kircher in his encyclopedia of the genre. A contemporary graphic novel has also been produced based on the work, and a digital copy of the original is available for study. Harald Siebert's 2006 monograph reconstructs the broader cosmological controversy through Kircher's text, underscoring its continued relevance to historians of science and literature alike.