Founded in 1977, it considers itself as the heir to Manuel Azaña's Republican Left.
Its contemporary presence is now limited to a handful of local councillors.
It maintains close links with the Nonviolent Radical Party.
Dictator Francisco Franco's death in 1975, allowed for the founding of new political parties.
Republican Left was formed in 1977 and in April 1986, became a founding member of the United Left electoral alliance, which it broke away from in 2002.