There are at least four bands called Medieval. 1) Heavy metal band from the United States 2) Power/thrash metal band from the United States. 3) Power metal band from Brazil 4) Black metal band from Malaysa The most prominent Medieval is the 1980s US heavy metal band that released only one album in 1987 titled "Medieval Kills!". The concept for the band Medieval was born in the late 70’s when two long time friends came together to satisfy their need for heavy, pounding, music.