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Libra Esoterica

A discovery library of the unseen

Gathered from 48 libraries and archives across 35 traditions. Rate, review, collect — and, with Pro, research across the texts themselves.

35 traditions, sized by the books shelved in eachHover or tap a point to explore

Books
93,815
Authors
61,804
Traditions
35
Sources
48
Read free
44,119
Languages
175

35 traditions

Where do you want to begin?

Every book is shelved under one or more traditions. Membership means relevance, not endorsement — a skeptic's survey and a practitioner's manual sit side by side.

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Public domain

Read free tonight

Complete texts you can open right now, from libraries and archives around the world. A fresh dozen every day.

All free texts

Deep cuts

Before 1700

Grimoires, alchemical treatises, and witch-trial literature from the earliest centuries of print.

Browse early works

Start here

Worth your attention

Well-documented records with covers, descriptions, and provenance — a good place to start.

Browse by quality

Recently added

New to the archive

The latest records to enter the catalog.

See recent additions

Libra Esoterica Pro

Research across the texts themselves.

The Research console is a reading companion for the whole collection: it reads the catalog and the public-domain full texts, answers in plain prose, and shows exactly which books it leaned on.

  • Ask across the whole library

    Put a question to 93,000+ catalog records and thousands of public-domain full texts at once, instead of one search box at a time.

  • Answers that cite their sources

    Every claim points back to specific books — and, where a scan has been ingested, to the passage itself — so you can check the console's work.

  • Compare traditions

    See how a practice or idea is treated in Kabbalah, in Theosophy, and in psychical research without leaving the conversation.

  • Follow a thread across centuries

    Trace a symbol, a place, or a person from a 1541 Latin print to a 2019 university press monograph.

See ProOpen the console
Sample answerResearch console · illustrative

Question

Where does the Emerald Tablet first appear in Latin?

Answer

Not from a Greek original: the tablet reaches Latin by way of Arabic. Its earliest surviving text is embedded in the Arabic Sirr al-khalīqa attributed to Balīnūs, and Latin versions appear in the twelfth century — one translated by Hugo of Santalla, another the “vulgate” text that alchemists came to quote and that Hortulanus later glossed1.

In print, the earliest Latin witness on these shelves is the Nuremberg De alchemia of 1541, which sets the tablet beside Hortulanus’s commentary2; a Strasbourg collection of 1566 reprints it “as found in his tomb,” commentary and all3. Both scans are open access and can be read here.

Sources in this library

  1. 1The secret history of Hermes TrismegistusFlorian Ebeling · 2006
  2. 2lumine De alchemia continentur haecǦābir Ibn-Ḥaiyān, Roger Bacon, Ricardus, Ḫālid Ibn-Yazīd al-Umawī, Hermes, Hortulanus, Chrysogonus Polydorus · 1541 · Read free
  3. 3Ars chemica, quod sit licita recte exercentibus, probationes doctissimorum iurisconsultorum. Septem tractatus seu capitula Hermetis Trismegisti, aurei. Eiusdem Tabula Smaragdina, in ipsius sepulchro inventa, cum commento Hortulani Philosophi. Studium consilii coniugii de massa solis et lunaeHermes · 1566 · Read free
A static example of the console’s citation format. Live answers are generated from the catalog and from ingested public-domain texts, and always link to the records they draw on.

Provenance

From 48 libraries and archives

Every record keeps its source identifiers, so you can follow it back to the catalog it came from.

About the sources