Historical eventJuly 261887

L. L. Zamenhof

L. L. Zamenhof (pictured) published Unua Libro, the first publication to describe Esperanto, a constructed international language.

Everything on July 26Original source

In context

When
Tuesday, July 26 1887139 years ago
Category
Historical eventA dated happening — a battle, treaty, launch, discovery, disaster or decision — recorded on this calendar day.
Era
19th century · 1880s
Recorded from
Wikipedia “On this day” feed

Russia, Greece and some other countries used the Julian calendar into the early 20th century, so local records may show a date up to 13 days earlier.

At a glance

Dates: From 1887.

What happened

L. L. Zamenhof (pictured) published Unua Libro, the first publication to describe Esperanto, a constructed international language.

July 26 through the years

Other entries on the same calendar day, in order.

  1. 1887L. L. Zamenhof
  2. 2005Space Shuttle program
  3. 2005Mumbai
  4. 2007Shambo
  5. 20082008 Ahmedabad bombings
  6. 2009Nigeria
  7. 2011Royal Moroccan Air Force
  8. 2012New Irish Republican Army
  9. 2016Solar Impulse
  10. 2016Sagamihara stabbings
  11. 2016Hillary Clinton

Also in 1887

  • September 5Exeter Theatre Royal fireA fire that killed 186 people broke out at the Theatre Royal, Exeter, England.
  • June 23Parliament of CanadaThe Parliament of Canada passed the Rocky Mountains Park Act, creating Banff National Park in Alberta as the country's first national park.
  • April 28Prussian Secret PoliceA week after being arrested by the Prussian Secret Police, French police inspector Guillaume Schnaebelé (pictured) was released on the or…
  • October 18Johannes BrahmsJohannes Brahms (pictured) conducted the premiere of his Double Concerto, composed for violinist Joseph Joachim and cellist Robert Hausmann.

Everything we record for 1887 →

Sources

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“L. L. Zamenhof”, What's On This Date, https://whatsonthisdate.com/app/event/l-l-zamenhof-1887-july-26, accessed October 27, 2026.

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Questions about this entry

When did L. L. Zamenhof happen?

July 26 1887 — 139 years ago, on a Tuesday.

Where does this text come from?

Wikipedia “On this day” feed. Summaries are short adaptations that link back to the source, not reprints.

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