---
name: Heraclitus of Ephesus
name_greek: Ἡράκλειτος ὁ Ἐφέσιος
eul_aid: bky
canonical: "https://eulogikon.org/authors/heraclitus-2-bky"
period: Archaic
dialect: Mixed Dialects (frg)
affiliation: Presocratic
works_count: 2
license: "https://creativecommons.org/publicdomain/mark/1.0/"
---

# Heraclitus of Ephesus

*Ἡράκλειτος ὁ Ἐφέσιος*

**eul_aid:** `bky` · [HTML page](https://eulogikon.org/authors/heraclitus-2-bky)

Heraclitus, presocratic philosopher of the 6th century BCE. Surviving fragments on nature and logos. Free to read and download from the Greek library archive.

## Works

- [On the Nature of the Universe](https://eulogikon.org/works/heraclitus-ephesus-nature-universe-bky-ab) — *Ἀποσπάσματα* · `bky-ab`
- [Testimonies](https://eulogikon.org/works/heraclitus-ephesus-testimonies-bky-aa) — *Μαρτυρίαι* · `bky-aa`

## License and provenance

Eulogikon publishes public-domain Greek texts in cleaned, structured, readable form and makes no copyright claim over that preparation (Public Domain Mark 1.0, https://creativecommons.org/publicdomain/mark/1.0/). Author records and the underlying corpus are at https://eulogikon.org/.