It is the name of a Song Festival that takes place in the city of Buga (or Guadalajara de Buga), in the Department of Valle in Colombia (not Cauca, as John says). It is actually a National and International Festival Performers of the Romantic Song and a Folkloric Theme. The trophies of La Ermita Vieja "Señor de los Milagros" are delivered, in Gold, Silver and Bronze, in addition to cash. It has been carried out for 51 years (since 1971). The presentations are currently held at the Bernardo Romero Lozano Acoustic Shell.
