Mythologia Fennica is a book written by Cristfried Ganander

Cristfried Ganander

Cristfried Ganander was a Finnish compiler of folk culture, a priest and a 18th century lexicographer. Ganander's greatest achievement was the compilation of the first fully extensive Finnish-language dictionary which was, however, unpublished. He was also a collector of folk culture well before...

. The book contains extensive explanations regarding Finnish mythology

Finnish mythology

Finnish mythology is the mythology that went with Finnish paganism which was practised by the Finnish people prior to Christianisation. It has many features shared with fellow Finnic Estonian mythology and its non-Finnic neighbours, the Balts and the Scandinavians...

 and is often seen as a dictionary. The book was published in 1789, and it contains a total of 430 entries. The book features a number of folk poetry and stories regarding Finnish folklore. The book has been reprinted numerous times especially towards the end of the 20th Century

20th century

Many people define the 20th century as running from January 1, 1901 to December 31, 2000, others would rather define it as beginning on January 1, 1900....

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Sources

• http://www.salakirjat.net/ganander_mythologia_fennica_suomalainen_mytologia.html (Finnish)