Marianna Bottini was only 16 years old when she composed her remarkably assured Requiem Mass in 1819.
It is coupled with a lively Sinfonia composed a year earlier on this recording available for download from recicatclassic.
Details here:
http://www.amazon.co.uk/Marianna-Bottini-Requiem-Sinfonia-maggiore/dp/B004S6JV1G/ref=sr_1_1?ie=UTF8&qid=1422230340&sr=8-1&keywords=Marianna+Bottini (http://www.amazon.co.uk/Marianna-Bottini-Requiem-Sinfonia-maggiore/dp/B004S6JV1G/ref=sr_1_1?ie=UTF8&qid=1422230340&sr=8-1&keywords=Marianna+Bottini)