L. L. Zamenhof, a Polish ophthalmologist, is credited with creating Esperanto in the late 19th century.

The first Esperanto book, titled "Unua Libro" (First Book), was published in 1887.

The Universal Esperanto Association (UEA) is the largest organization dedicated to promoting Esperanto globally.

The first World Esperanto Congress was held in Boulogne-sur-Mer, France, in 1905.

Estimates vary, but it is generally believed that there are around 1 million Esperanto speakers worldwide.

La Espero, founded in 1889, is the oldest continuously published Esperanto magazine.

La Espero (The Hope) is the Esperanto anthem, written by L. L. Zamenhof.

Kálmán Kalocsay, a Hungarian Esperanto writer, is known for his novel "La Abismo" (The Abyss).

La Sankta Biblio is the Esperanto translation of the Bible, completed in 1926.

Julio Baghy, a Hungarian Esperanto poet, is known for his collection "Kantoj de l'Amo" (Songs of Love).

Internacia Festivalo de Esperanto-Filmoj (International Festival of Esperanto Films) is held annually in Poland.

Esperanto-Haus (Esperanto House) is an Esperanto museum located in Herzberg am Harz, Germany.

Radio Esperanto is an Esperanto radio station that broadcasts from the Netherlands.

Assimil is an Esperanto language learning method that uses a gradual approach to introducing new words and grammatical concepts.

Esperanto-Diplomo is the Esperanto language proficiency exam administered by the Esperanto Language Society.