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Primary sourceBook1575

Spiritalium liber, first chapter

Hero of Alexandria · 1575

The opening page of a 1575 Latin printed edition of Hero of Alexandria's Pneumatics, with a decorated initial letter.

This 1575 printed edition preserves Hero's own treatise on pneumatics, showing his lasting influence.

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Scanned page of a 16th-century Latin printed book titled 'Heronis Alexandrini Spiritalium liber', with a woodcut decorated initial C showing a naked infant holding a staff and a rope with a weight, set against a landscape. Dense black-letter text is printed in two columns.
Heronis Alexandrini Spiritalium liber, 1575 Latin edition. Library of Congress.

About this source

What it is

This is a page from a 1575 printed Latin edition of Hero of Alexandria's work known as the Pneumatics (Spiritalium liber). The page shows the opening chapter with a decorated woodcut initial letter 'C', featuring a figure holding a staff and a weighted rope, printed in two columns of black-letter text.

Why it matters

Hero's Pneumatics describes devices powered by air, steam and water pressure. This 1575 Latin printing shows how his work was still studied and reproduced over a thousand years after his lifetime, carrying his ideas about mechanics into the European printing age. The decorated initial reflects the printing conventions of its own era rather than anything original to Hero.

Look closer

  • Why might a printer in 1575 have decorated the first letter of the text so elaborately?
  • What does the survival and reprinting of this text across centuries tell us about Hero's influence?
  • What has likely changed between Hero's original Greek text and this Latin printed version?

This book is part of the curated material that grounds the AI version of Hero of Alexandria on Humy.ai — when students ask about related events, the AI can quote it and cite it.

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Manuscript page with Greek text in brown ink at top and bottom, and colored line drawings in the middle showing Hero's hydraulic bird-singing apparatus: several birds perched on pipes and arches, a tall cylindrical water vessel, a horizontal tank, and a bell-shaped weight on a chain.Book

Secondary source

Pneumatica

Hero of Alexandria · 1st century AD (this copy later)

Page from a Greek manuscript showing a colored line drawing of a temple-like structure with columns, arches, and a dome-like roof, with hidden tanks and mechanisms below. Greek handwritten text fills the lower part of the page.Book

Secondary source

Automata (Bacchus diagram)

Hero of Alexandria · 1st century AD (this copy later)

Painted miniature from a Greek manuscript: a bearded man with long grey hair in a golden-brown cloak extends his right hand toward the left, beside a dark archway. Red Greek lettering reads 'ΗΡΩΝ ΦΙΛΟΣΟΦΟ' beside him.Painting

Secondary source

Hero of Alexandria in the Codex of Saint Gregory Nazianzenos

Unknown author · 9th century AD

Illuminated manuscript page with colored design drawing of a large siege engine or cannon in red, blue, green and tan, with a vertical arrow-like beam at top, surrounded by Greek text in brown ink on parchment.Document

Secondary source

Belopoiika (design drawing of a siege engine)

Hero of Alexandria · 1st century AD (this copy later)

Title page of a 1589 Italian book, engraved in black and white with an ornate architectural border of columns, scrolls and a central medallion. Printed text reads Di Herone Alessandrino De gli automati, ouero Machine se moventi, libri due, tradotti dal greco da Bernardino Baldi, with a small shield reading In Venetia, appresso Girolamo Porro, 1589.Book

Secondary source

De gli automati, ouero Machine se mouenti

Hero : Alexandrinus · 1589

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