German singer best known as the frontman for the seminal power metal band Blind Guardian.
He played bass on Blind Guardian's first album, Battalions of Fear.
He is well-known for his lyrics, which typically revolve around medieval fantasy lore and the works of J.R.R. Tolkien.
He has been married and has a son.
He and Iced Earth's Jon Schaffer have formed a side project called Demons and Wizards.