Maria Cattarina Calegari

Cornelia Calegari [Maria Cattarina (also known as Maria Caterina)] (1644 – after 1675), was an Italian composer, singer, organist, and nun. She was revered for her singing talents in her home city and became a published composer in 1659, at the age of 15, with the release of her book of motets, Motetti à voce sola.

Read more about this composer on Wikipedia.