Maria Cecilia Calleja Maronilla, the daughter of Mariano Sasis Maronilla and Rafaela Calleja was born on February 1, 1900 in Libon, Albay. At 18, she joined the Daughters of Charity and was the first nun who enrolled at the UP Conservatory of Music under Dr. Antonio Molina. On February 1932, she rendered her senior recital.

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