Episode 1 of 1

Publication of Unua Libro

When
26 July 1887
Where
Russian Empire
Part of
Unua Libro introduces Esperanto

Zamenhof published Unua Libro in Russian on 26 July 1887, marking the formal start of the Esperanto movement.

The book was published by Kelter in Russian as International Language. Zamenhof used the pseudonym Doktoro Esperanto. The publication established the core vocabulary and grammar of the language, though the name Esperanto was not used for the language itself until 1889.

Sources

  1. Unua Libro Wikipedia, revision of 2026-10-03

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.