Folk metal developed in Europe during the 1990s. As the name suggests, the genre is a fusion of heavy metal with folk music. This includes the widespread use of folk instruments and, to a lesser extent, traditional singing styles. Examples of the genre include Skyclad, Finntroll, Eluveitie, Korpiklaani, Ensiferum, Turisas, Moonsorrow, Elvenking, Mägo de Oz, Tuatha de Danann, Saurom, Alestorm and Týr; the bands Cruachan, Orphaned Land and Subway to Sally are representative of the three subgenres Celtic metal, Oriental metal and medieval metal respectively. Pagan metal is also considered a genre separate from folk metal that is an extreme form and focuses on lyrics rather than definite characteristics of the genre.