Which era saw various noble figures emerge as well-known composers?

This era was known as the Middle Ages. One of these noble figures was Hildegard von Bingen. Hildegard of Bingen, also known as Blessed Hildegard and Saint Hildegard, was a German abbess, author, counselor, linguist, naturalist, scientist, philosopher, physician, herbalist, poet, channeller, visionary and composer. Elected a magistra by her fellow nuns in 1136, she founded the monasteries of Rupertsberg in 1150 and Eibingen in 1165. She is a composer with an extant biography from her own time. One of her works, the Ordo Virtutum, is an early example of liturgical drama. She wrote theological, botanical and medicinal texts, as well as letters, liturgical songs, poems, and the first surviving morality play, while supervising brilliant miniature Illuminations. :) (That's just extra info in case you're interested!)

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