thumb|upright=1.1|"[[Monk|Frater Basilius Valentinus, monk of the Benedictine order and Hermetic philosopher": imaginary portrait in the frontispiece from Chymische Schrifften, 1717 ]]

thumb|upright=1.1|The Peterskirche, Erfurt, as it appeared in 2007

Basil Valentine is the Anglicised version of the name Basilius Valentinus, ostensibly a 15th-century alchemist, possibly Canon of the Benedictine Priory of Saint Peter in Erfurt, Germany but more likely a pseudonym used by one or several 16th-century German authors.

According to John Maxson Stillman, who wrote on the history of chemistry, there is no evidence of such a name on the rolls in Germany or Rome and no mention of this name before 1600. His putative history, like his imaginary portrait, appears to be of later creation than the writings themselves.

During the 18th century it was suggested that the author of the works attributed to Basil Valentine was Johann Thölde, a salt manufacturer in Germany who lived roughly 1565–1624. Modern scholarship now suggests that one author was Thölde, but that others were involved. Thölde published the first five books under Valentine's name.

Whoever he was, Basil Valentine had considerable knowledge of chemistry. He demonstrated that ammonia could be obtained by the action of alkali on sal-ammoniac (ammonium chloride), described the production of hydrochloric acid by acidifying brine of common salt (sodium chloride), and created ethyl chloride and oil of vitriol (sulfuric acid), among other achievements.

The Twelve Keys of Basil Valentine

thumb|upright=1.1|Illustration of the first key

The Twelve Keys of Basil Valentine is a widely reproduced alchemical book attributed to Valentine, first published in 1599 by Johann Thölde. (Latin)

  • Le char triomphal de l'antimoine, translation by Sauvin, François, 17th century (1646), introduction by Sylvain Matton; préface by Joachim Tancky. Editions Retz, 1977, 254 p. [https://books.google.com/books?id=kPZZuS3i2AgC&q=Basile+Valentin] (French)
  • Les livres secrets et le dernier testament de frere Basile Valentin Benedictin, de la grande pierre des anciens philosophes et autres mysteres cachés de la nature. Le tout tiré et transcrit de l'original trouvé dans le haut autel sous une petite table de marbre a Erfurt et mis en lumiere ou imprimé a línstante priere des enfans de la science ... by Basilius Valentinus. (French) Strasbourg: 1651. (French)
  • Les douze clefs de philosophie de frere Basile Valentin ... : traictant de la vraye medecine metalique : plus l'Azoth, ou, Le moyen de faire l'or caché des philosophes : traduction francoise. Basilius Valentinus.; Jean Gobille; Clovis Hesteau Nuisement, sieur de. Paris : Chez Pierre Moët ..., 1660. (French)
  • Of natural and supernatural things : also, of the first tincture, root, and spirit of metals and minerals by Basilius Valentinus. London : Printed, and are to be sold by Moses Pitt, 1670. (English)
  • The last will and testament of Basil Valentine, monke of the order of St. Bennet, by Basil Valentine; translated by John Worlidge. London : Printed by S.G. and B.G. for Edward Brewster, 1671. (English)
  • Chymische Schrifften by Basilius Valentinus. Hamburg: 1677. (German)
  • Compendium veritatis philosophicum fratis Basilii Valentini Manuscript (Ms.180), 1780. (German)
  • Les douze clefs de la philosophie. Eugène Canseliet, translator. Paris, Éditions de Minuit, 1956, 264 p. [http://herve.delboy.perso.sfr.fr/emblemes.htm] (French)
  • Révélations des mystères des teintures des sept métaux, Pierre Savoret, editor. Omnium littéraire, 1976. (French) [http://herve.delboy.perso.sfr.fr/revelation_basile.html]
  • Le dernier testament de Basile Valentin : livres I, II, III, IV et V, dans lequel sont montrées les mines, l'origine d'icelles, leurs natures et propriétés... by Basile Valentin; edited by Joseph Castelli. Montélimar : Castelli, 2008. (French)
  • Las doce llaves de la filosofía by Basilius Valentinus. Barcelona: Muñoz Moya y Montraveta, 1986. (Spanish)

See also

  • List of Catholic clergy scientists

References

  • Transcription of Triumphal Chariot of Antimony
  • Transcription of Azoth, ou le moyen de faire l'or caché des philosophes, de frère Basile Valentin
  • Library Catalog entry for Last will and testament
  • Musaeum Hermeticum Reformatum et Amplificatum (1678) from Science History Institute Digital Collections.