---
name: Theodosius of Bithynia
name_greek: Θεοδόσιος ὁ Βιθυνικός
eul_aid: lww
canonical: "https://eulogikon.org/authors/theodosius-of-bithynia-lww"
period: Hellenistic
dialect: Technical Koine
works_count: 3
license: "https://creativecommons.org/publicdomain/mark/1.0/"
---

# Theodosius of Bithynia

*Θεοδόσιος ὁ Βιθυνικός*

**eul_aid:** `lww` · [HTML page](https://eulogikon.org/authors/theodosius-of-bithynia-lww)

Theodosius of Bithynia, Hellenistic astronomer and mathematician. Works include spherical geometry. Free to read and download from the Greek library archive.

## Works

- [On Days and Nights](https://eulogikon.org/works/theodosius-bithynia-days-nights-lww-aa) — *Περὶ ἡμερῶν καὶ νυκτῶν* · `lww-aa`
- [On Dwellings](https://eulogikon.org/works/theodosius-bithynia-dwellings-lww-ab) — *Περὶ οἰκήσεων* · `lww-ab`
- [Spherical](https://eulogikon.org/works/theodosius-bithynia-spherical-lww-ac) — *Σφαιρικά* · `lww-ac`

## 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/.