Montserrat Caballé sings the title role in Bellini's NORMA in a performance given at Madrid in 1978.
Watch and listen here.
Ivo Vinco (above) is an impressive Oroveso, Pedro Lavirgen sings Pollione, and Fiorenza Cossotto - though somewhat past her peak - has many wonderful passages as Adalgisa. But...it's all about Montserrat.