Columbia subject headings:
Associazione culturale "L'Orfeo."
Music festivals--Italy--Spoleto--History.
Orfeo Ensemble di Spoleto.
Harvard subject headings:
Associazione culturale "L'Orfeo."
Concerts--Italy--Spoleto--History.
Orfeo Ensemble.
Princeton subject headings:
Associazione culturale "l'Orfeo" (Spoleto, Italy)
Concerts--Italy--Spoleto--History--21st century.
L'Orfeo Ensamble (Musical group)
Music--Italy--Spoleto--21st century--History and criticism.