This week's show pays tribute to the musical legacy of Hildegard of Bingen, whose feast day on the Catholic church calendar is September 17. Hildegard's rhapsodic music, none of which was based on plainchant, is as unique in our time as it was in hers. We'll hear performances by Gothic Voices, soprano Emma Kirkby, and Sequentia. 

• Hildegard of Bingen: Columba aspexit. Performed by Gothic Voices.
• Hildegard of Bingen: O viridissima virga. Performed by Gothic Voices.
• Hildegard of Bingen: Ordo Virtutum (selections). Performed by Sequentia.
• Hildegard of Bingen: O Ierusalem. Performed by Sequentia.
• Hildegard of Bingen: O Ignee Spiritus. Performed by Sequentia.
• Anon.: Instrumental piece. Performed by Sequentia.
• Hildegard of Bingen: O Ecclesia. Performed by Gothic Voices.