Antiguo Régimen is a Spanish heavy metal band formed in 1998 in Madrid. They are known for their powerful and aggressive sound, which combines elements of thrash, death, and black metal. The band has released several albums over the years, including "Naturaleza Fractal," "Política de Tierra Quemada," and "La Formación de la Sombra." Antiguo Régimen has toured extensively throughout Europe and has shared the stage with some of the biggest names in metal, including Slayer, Megadeth, and Anthrax.