How did Finnish folk poetry survive before it was written down?

Before Finnish folk poetry was systematically collected and transcribed in the 18th and 19th centuries, it survived through a rich oral tradition passed down through generations.12

The preservation of these long passages was facilitated by a specific poetic structure: a trochaic four-stress line that was well-suited to the Finnish language and made memorization easier. This style was further characterized by the use of alliteration, parallelism, and repetition, which helped performers maintain the flow and content of the poems.12

While this oral transmission allowed the poetry to persist for centuries, it also meant that poems often changed or became conflated with one another over time. These works, which included epic sequences about mythical events and heroes as well as lyrical songs about everyday life, were eventually compiled by figures like Elias Lönnrot. Lönnrot synthesized this oral material into the Finnish national epic, the Kalevala, and the collection of lyrics known as the Kanteletar. Today, the Finnish Literature Society maintains one of the world's largest collections of this oral tradition.13