First page of the soprano part of the cantata "Wie schön leuchtet der Morgenstern", BWV 1, by Johann Sebastian Bach. Manuscript copied by Johann Andreas Kuhnau.
J. S. Bach
<a rel="nofollow" class="external text" href="https://www.bach-digital.de/receive/BachDigitalSource_source_00003216">Digitised manuscript</a>, Bach Digital archive, Library of St Thomas School, Leipzig