Progressive rock/folk rock group from Argentina.

Eternidad was formed in the mid-1970s by brothers Daniel Mendez and Roberto Mendez and after establishing themselves as a quintet, they began to perform on small stages where they achieved a certain level of importance.

In 1977 they agreed to their first record production Eternidad - Apertura which hit the shelves a year later when the group was going through some ups and downs. At that time, the drummer Luis Yanes (later dean of the faculty of philosophy and letters) was replaced by Daniel Torriggiane with whom they continued to perform live.

With expectations not being realized and discontent between some members, the band separated in the summer of 1979.