Leviathan is the seventeenth studio album by Swedish symphonic metal band Therion.

Two music videos were released for the album: Die Wellen der Zeit and Tuonela; also a lyric video was released for the song Leviathan.

A few months after the release of the album, a third music video was made for Eye of Algol.

Vocalist Thomas Vikström confirmed that the band indeed aimed to make a more "normal" album again.

[5] Christofer Johnsson has described the Leviathan trilogy as "hit albums" deliberately drawing influence from the most popular and beloved elements of their back catalog, with Leviathan I being bombastic and catchy.