Johann von Laatz

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Johann von Laatz , or Johannes von Laaz, Joannes de Lasnioro, was a Bohemian alchemist of the first half of the 15th century.

The name probably indicates the place of origin ( Ledce u Židlochovic , German Laatz).

His Tractatus aureus de lapide philosophorum (Golden Treatise on the Philosopher's Stone ), first printed in 1611. It was reprinted in the Theatrum Chemicum . He represents a transmutation of metals based on mercury (Mercurius), sulfur (Sulfur) and gold (Sol).

There he pretends to be a student of the alchemist Antonius von Florenz (Antonius de Florentia), who would have been murdered in Bohemia. He is also mentioned by the doctor Benedikt Nikolaus Petraeus in the preface to his edition of the Chymische Schriften by Basilius Valentinus . Then he tested the alchemical knowledge of Barbara von Cilli , the enterprising wife of Emperor Sigismund , who, according to Laatz, deceived many merchants with alchemical metal transformation.

literature

personal data
SURNAME Laatz, Johann von
ALTERNATIVE NAMES Laaz, Johannes von; Lasnioro, Joannes de
BRIEF DESCRIPTION bohemian alchemist
DATE OF BIRTH 14th century or 15th century
DATE OF DEATH 15th century