What is vespertine?

Vespertine is an album released by Icelandic singer Björk in 2001. The album is notable for its experimental sound, incorporating layers of orchestration, electronic beats, and an use of traditional Icelandic instruments. The lyrics of the album deal with themes such as love, sex, and the natural world, and are often abstract and poetic. The album attained critical acclaim, with many praising it for its unique sound and adventurous nature. Vespertine also featured collaborations with producers such as Matthew Herbert and Valgeir Sigurðsson, as well as vocal contributions from artist such as Inga Bergþórsdóttir.