In 1913 Alomía Robles composed “El cóndor pasa" and the song was first performed publicly at the Teatro Mazzi in Lima.
The musical group, Los Incas performed the song in Paris in 1960s where it was heard by Paul Simon of Simon and Garfunkel. Los Incas told Simon, perhaps through ignorance, that the song was a 19th century musical composition by an anonymous composer.
Simon became interested in the song and composed new lyrics for the melody. The song appeared on Simon and Garfunkel’s 1970 album Bridge over Troubled Water.
I remember learning about this in school back in June. Information courtesy of Wikipedia, which I also became familiar with last summer. ;)