<bdi><a href="https://en.wikipedia.org/wiki/en:Michael_Sittow" class="extiw" title="w:en:Michael Sittow"><span title="painter who worked in Tallinn (1459-1525)">Michael Sittow</span></a>
</bdi>
possibly late 15th century, but probably early 16th century as this was painted in her late teens/early twenties
<a rel="nofollow" class="external text" href="http://www.dia.org/mobile/object-info/35c12f36-1403-45f2-be0b-a95bd101daee.aspx?position=1">Detroit Institute of Arts</a>