Often referred to as The Singing Nation, the Estonians have one of the biggest collections of folk songs in the world, with written records of about 133,000 folk songs. From 1987, a cycle of mass demonstrations featuring spontaneous singing of national songs and hymns that were strictly forbidden during the years of the Soviet occupation to peacefully resist the illegal oppression. In September 1988, a record 300,000 people, more than a quarter of all Estonians, gathered in Tallinn for a song festival.